# DupeStack — full chemical index

Machine-readable catalogue of branded products, bulk actives, CAS numbers and mixing formulations. Prices are typical UK snapshots, not live merchant feeds.

Site: https://dupestack.co.uk
Contact: hello@dupestack.co.uk

## Mission
Deconstruct the brand. Buy the molecule. Each teardown maps a retail pack to an unbranded active, a dilution ratio, COSHH-minded PPE, and an Amazon UK DIY stack.

## Patio & exterior

### Wet & Forget Exterior Surface Cleaner

- URL: https://dupestack.co.uk/teardowns/wet-and-forget-exterior/
- Brand: Wet & Forget
- Retail pack: 5 litres · £34.00 typical snapshot
- Labelled active: Benzalkonium chloride (8%)
- Carrier: Water
- Bulk dupe: Benzalkonium chloride (BAC 50)
- CAS: 68424-85-1
- Formula: C22H40ClN
- Bulk pack: 5 litres · £19.99
- Dilution: 1:9
- Cost per working litre: £0.40
- Indicative saving: 88% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Put on nitrile gloves and splash goggles before opening the concentrate.
  - Work outdoors or in a well-ventilated area. Do not mix with bleach, acids or anionic detergents.
  - Measure 1 part BAC 50 into a clean sprayer, then add 9 parts water (e.g. 500 ml concentrate + 4.5 L water for a 5 L sprayer).
  - Invert gently to mix. Apply to a dry patio until surfaces glisten; do not rinse.
  - Leave to weather. Algae and lichen typically collapse over 2–7 days. Repeat on north-facing stone if needed.

### Patio Magic!

- URL: https://dupestack.co.uk/teardowns/patio-magic/
- Brand: Patio Magic
- Retail pack: 5 litres · £24.99 typical snapshot
- Labelled active: Benzalkonium chloride (9.9%)
- Carrier: Water
- Bulk dupe: Benzalkonium chloride (BAC 50)
- CAS: 68424-85-1
- Formula: C22H40ClN
- Bulk pack: 5 litres · £19.99
- Dilution: 1:4
- Cost per working litre: £0.80
- Indicative saving: 84% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Wear nitrile gloves and splash goggles. Work outdoors.
  - Patio Magic is sold at ~10% BAC. From BAC 50, mix 1 part concentrate with 4 parts water to land near that working strength.
  - Apply to dry masonry until wet. Do not mix with bleach or acids.
  - Leave to weather. Do not rinse. Keep pets off until dry.
  - Repeat on persistent north-facing growth after two weeks.

### HG Rust Stain Remover

- URL: https://dupestack.co.uk/teardowns/hg-rust-stain-remover/
- Brand: HG
- Retail pack: 500 millilitres · £8.50 typical snapshot
- Labelled active: Oxalic acid (10%)
- Carrier: Water
- Bulk dupe: Oxalic acid dihydrate
- CAS: 6153-56-6
- Formula: C2H2O4·2H2O
- Bulk pack: 1 kg · £9.99
- Dilution: 50 g/L
- Cost per working litre: £0.50
- Indicative saving: 86% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Toxic if swallowed; wear gloves and goggles. Keep away from children and pets.
  - Dissolve 50 g of crystals per litre of warm water (about 5% w/v) for a patio rust wash.
  - Apply, dwell 10–20 minutes, agitate, then rinse thoroughly with plenty of water.
  - Do not mix with bleach (toxic gases) or use on marble that you care about — it etches carbonates.
  - Store dry. Neutralise spills with bicarbonate, then rinse.

### HG Hagesan Black Spot Remover

- URL: https://dupestack.co.uk/teardowns/hg-patio-black-spot-remover-dupe/
- Brand: HG
- Retail pack: 5 litres · £24.99 typical snapshot
- Labelled active: Sodium hypochlorite (9.5%)
- Carrier: Water and surfactants
- Bulk dupe: Sodium hypochlorite 14–15% (industrial / dairy grade)
- CAS: 7681-52-9
- Formula: NaOCl
- Bulk pack: 5 litres · £18.00
- Dilution: 1:1 with water (yields ~7.5% working solution) + 10 ml washing-up liquid
- Cost per working litre: £1.80
- Indicative saving: 64% per litre
- PPE: gloves, goggles, respirator, well-ventilated
- Mixing:
  - Apply onto completely dry paving using a chemical-resistant pump sprayer or plastic watering can.
  - Allow 30–60 minutes dwell time without letting the surface dry out entirely.
  - Rinse thoroughly with copious fresh water. Keep run-off away from delicate grass edges.
  - Never mix with acids, vinegar or ammonia.

### Everbuild Mortar Clen Brick & Patio Acid

- URL: https://dupestack.co.uk/teardowns/everbuild-mortar-clen-brick-acid-dupe/
- Brand: Everbuild
- Retail pack: 5 litres · £16.50 typical snapshot
- Labelled active: Hydrochloric acid (muriatic acid) (9%)
- Carrier: Water and surfactants
- Bulk dupe: Technical hydrochloric acid 32–36%
- CAS: 7647-01-0
- Formula: HCl
- Bulk pack: 5 litres · £18.00
- Dilution: 1:3
- Cost per working litre: £0.90
- Indicative saving: 73% per litre
- PPE: gloves, goggles, respirator, acid-resistant
- Mixing:
  - Corrosive. Acid-resistant gloves, splash goggles and a respirator. Always add acid to cold water — never water into concentrated acid.
  - 1 part 36% acid + 3 parts water yields about 9% working brick acid (5 L concentrate → 20 L).
  - Pre-wet the brick. Apply with an acid-resistant brush, dwell a few minutes, then rinse copiously. Keep off limestone, marble and metals you care about.
  - Neutralise spills with bicarbonate, then rinse. Store locked away from bleach (chlorine gas).

### Thompson's Water Seal Masonry Protector

- URL: https://dupestack.co.uk/teardowns/thompsons-water-seal-masonry-protector-dupe/
- Brand: Thompson's
- Retail pack: 5 litres · £36.00 typical snapshot
- Labelled active: Hydrophobic silane/siloxane emulsion (8%)
- Carrier: Water, solvents and paraffin wax
- Bulk dupe: Water-based silane/siloxane masonry impregnator (50%)
- CAS: 2943-75-1
- Formula: —
- Bulk pack: 1 litre concentrate (makes 10 litres) · £26.00
- Dilution: 1:9
- Cost per working litre: £2.60
- Indicative saving: 64% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Wear gloves and goggles. Work in ventilation. 1 litre of 50% concentrate + 9 litres of clean water makes 10 litres of sealer.
  - Apply with a low-pressure sprayer or coarse roller, bottom to top, until the masonry is saturated. Do not puddle.
  - Allow 24 hours to cure before judging the bead. Test a small patch on lime mortar and dense stone.

### Algon Organic Path, Patio & Deck Cleaner Concentrate

- URL: https://dupestack.co.uk/teardowns/algon-organic-path-patio-deck-cleaner-dupe/
- Brand: Algon
- Retail pack: 2.5 litres · £11.99 typical snapshot
- Labelled active: Acetic acid (18%)
- Carrier: Water and a trace of alkyl polyglycoside surfactant
- Bulk dupe: Spirit vinegar 25% (acetic acid)
- CAS: 64-19-7
- Formula: CH3COOH
- Bulk pack: 5 litres · £9.99
- Dilution: 1:4.5 (to ~4.5% working, matching Algon 1:3)
- Cost per working litre: £0.36
- Indicative saving: 70% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Wear household gloves. Keep off foliage — acetic acid scorches leaves.
  - 1 part 25% spirit vinegar + 4.5 parts water lands near 4.5% acetic acid, the same order of strength as Algon diluted 1:3.
  - Apply to dry masonry with a sprayer or soft broom. Do not rinse. Results show over a few days as algae browns off.
  - 5 litres of 25% makes about 28 litres of working mix. Store away from bleach (chlorine gas).

### Jenolite Rust Remover Gel

- URL: https://dupestack.co.uk/teardowns/jenolite-phosphoric-rust-remover-dupe/
- Brand: Jenolite
- Retail pack: 500 millilitres · £8.99 typical snapshot
- Labelled active: Phosphoric acid (25%)
- Carrier: Water and a thickener
- Bulk dupe: Phosphoric acid 81% (food / technical) diluted to ~25%
- CAS: 7664-38-2
- Formula: H3PO4
- Bulk pack: 1 litre · £12.50
- Dilution: 1:2.2 (to ~25% w/w working, matching the gel)
- Cost per working litre: £3.90
- Indicative saving: 78% per litre
- PPE: gloves, goggles, well-ventilated, acid-resistant
- Mixing:
  - Causes burns. Splash goggles, household gloves, ventilation. Always add acid to water. Never mix with bleach.
  - About 1 part 81% phosphoric + 2.2 parts water lands near 25% — the same order of strength as the branded gel.
  - Apply to dry rusted steel, dwell 15–30 minutes, rinse, dry, prime. Not for aluminium, zinc, or marble.
  - 1 litre of 81% makes about 3.2 litres of 25% liquor. Store in a labelled HDPE bottle.

## Lawn & garden

### Miracle-Gro Organic Liquid Seaweed

- URL: https://dupestack.co.uk/teardowns/miracle-gro-organic-liquid-seaweed/
- Brand: Miracle-Gro
- Retail pack: 1 litre · £13.50 typical snapshot
- Labelled active: Ascophyllum nodosum kelp extract (100%)
- Carrier: Water (diluted cold-pressed extract)
- Bulk dupe: Soluble Ascophyllum nodosum kelp powder
- CAS: 84775-78-0
- Formula: —
- Bulk pack: 1 kg · £22.00
- Dilution: 20 g/L
- Cost per working litre: £0.44
- Indicative saving: 85% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Kelp powder is a dust: wear gloves and mix outdoors or under extraction.
  - Weigh 20 g of soluble kelp powder per litre of water for a concentrated foliar feed (1 kg yields ~50 L).
  - Slurry the powder in a jug of lukewarm water first, then make up to volume to avoid clumps.
  - Apply as a fine foliar spray in still weather, morning or evening. Do not spray in strong sun.
  - For a gentler weekly feed, use 5 g/L. Store unused powder dry and sealed.

### Evergreen Complete 4-in-1 Lawn Feed & Moss Killer

- URL: https://dupestack.co.uk/teardowns/evergreen-complete-4-in-1/
- Brand: Evergreen
- Retail pack: 100 m² box · £24.00 typical snapshot
- Labelled active: Ferrous sulphate heptahydrate (100%)
- Carrier: Granular filler and turf surfactant
- Bulk dupe: Agricultural soluble iron(II) sulphate heptahydrate
- CAS: 7782-63-0
- Formula: FeSO4·7H2O
- Bulk pack: 25 kg · £18.50
- Dilution: 10 g/m²
- Cost per working litre: £0.45
- Indicative saving: 91% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Ferrous sulphate stains stone, clothing and skin. Wear gloves and goggles; keep off patios.
  - Apply 10 g per m² (1 kg per 100 m²). A 25 kg sack treats approximately 2,500 m².
  - Dissolve in water at 10 L per 100 m² and apply with a watering can or boom, or spread dry and water in.
  - Moss blackens within 48 hours. Rake out dead moss after 1–2 weeks and overseed bare patches.
  - Do not apply to drought-stressed turf, and never mix with lime in the same tank.

### Growmore Garden Fertiliser

- URL: https://dupestack.co.uk/teardowns/growmore-garden-fertiliser/
- Brand: Growmore
- Retail pack: 4 kg · £9.50 typical snapshot
- Labelled active: NPK 7-7-7 compound (21%)
- Carrier: Granular filler
- Bulk dupe: Agricultural NPK 7-7-7 compound fertiliser
- CAS: 66455-26-3
- Formula: N + P2O5 + K2O
- Bulk pack: 25 kg · £22.00
- Dilution: 100 g/m²
- Cost per working litre: £0.88
- Indicative saving: 63% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Wear gloves. Avoid breathing dust; apply on a still day.
  - Broadcast 70–100 g per m² around plants or over beds, then water in.
  - A 25 kg sack covers roughly 250 m² at 100 g/m².
  - Do not pile against stems. Store dry — it cakes when damp.
  - This is a feed, not a pesticide. Keep off ponds.

### Miracle-Gro All Purpose Liquid Plant Food

- URL: https://dupestack.co.uk/teardowns/miracle-gro-all-purpose-liquid/
- Brand: Miracle-Gro
- Retail pack: 1 litre · £6.00 typical snapshot
- Labelled active: Soluble NPK (approx. 8-7-6) (21%)
- Carrier: Water
- Bulk dupe: Soluble NPK 20-20-20 (hydroponic grade)
- CAS: 66455-26-3
- Formula: N + P2O5 + K2O
- Bulk pack: 1 kg · £12.00
- Dilution: 1 g/L
- Cost per working litre: £0.01
- Indicative saving: 80% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Wear gloves when handling the powder. Avoid inhaling dust.
  - Dissolve 1 g per litre of water for a general foliar/root feed (1 kg yields ~1,000 L).
  - For hungrier tomatoes or baskets, 1.5–2 g/L. Flush pots monthly to avoid salt build-up.
  - Do not exceed the rate — fertiliser burn is real.
  - Store sealed and dry.

### Mo Bacter Organic Lawn Moss Killer & Fertiliser

- URL: https://dupestack.co.uk/teardowns/mo-bacter-organic-lawn-moss-killer-dupe/
- Brand: Mo Bacter
- Retail pack: 20 kg bag · £38.00 typical snapshot
- Labelled active: Potassium oxide (potash) with Bacillus subtilis (20%)
- Carrier: Organic compost and nitrogen/phosphorus base (5-5-20)
- Bulk dupe: Sulphate of potash (0-0-50)
- CAS: 7778-80-5
- Formula: K2SO4
- Bulk pack: 10 kg · £18.50
- Dilution: 20 g/m²
- Cost per working litre: £0.04
- Indicative saving: 76% per litre
- PPE: gloves
- Mixing:
  - Wear gloves. Apply 20 g per m² of soluble sulphate of potash — broadcast dry and water in, or dissolve at 20 g/L in a watering can.
  - A 10 kg bag covers about 500 m². That is more potassium oxide than a 20 kg 5-5-20 lawn bag, without ferrous sulphate staining on stone.
  - Water afterwards with an aerated compost tea or a broad-spectrum Bacillus lawn inoculant if you want the organic-matter digestion step.
  - Keep off ponds. Store dry.

### Doff Natural Hormone Rooting Powder

- URL: https://dupestack.co.uk/teardowns/doff-hormone-rooting-powder-dupe/
- Brand: Doff
- Retail pack: 75 g tub · £4.99 typical snapshot
- Labelled active: Indole-3-butyric acid (IBA) (0.1%)
- Carrier: Talcum powder (99.9%)
- Bulk dupe: Indole-3-butyric acid (IBA)
- CAS: 133-32-4
- Formula: C12H13NO2
- Bulk pack: 1 g IBA (makes 1 kg of 0.1% powder) · £8.50
- Dilution: 0.1% w/w in talc (0.5 g IBA per 500 g talc)
- Cost per working litre: £0.01
- Indicative saving: 87% per litre
- PPE: gloves, respirator
- Mixing:
  - IBA is a plant-growth regulator. Wear gloves and an FFP2 mask; weigh in a still room. Keep away from children.
  - Dissolve 0.5 g of IBA in about 20 ml of isopropyl alcohol.
  - Fold into 500 g of unscented pharmaceutical talc until evenly damp. Spread thin and dry. That is 0.1% IBA — the same strength as the 75 g tub.
  - Dip the cut base, tap off surplus, and strike as usual. 1 g of IBA makes about 1 kg of finished powder (roughly thirteen 75 g tubs).

### SB Plant Invigorator & Bug Killer

- URL: https://dupestack.co.uk/teardowns/sb-plant-invigorator-and-bug-killer-dupe/
- Brand: SB
- Retail pack: 500 millilitres · £14.99 typical snapshot
- Labelled active: Foliar urea and alkyl surfactants (5%)
- Carrier: Water and chelating agents
- Bulk dupe: Horticultural potassium soft soap
- CAS: 57-13-6 / 61790-44-1
- Formula: —
- Bulk pack: 1 litre soap (plus 1 kg urea in the stack) · £13.50
- Dilution: 10 ml soap + 5 g urea per litre
- Cost per working litre: £0.14
- Indicative saving: 53% per litre
- PPE: gloves, goggles
- Mixing:
  - Mix 10 ml of potassium soft soap into 1 litre of warm water in a trigger sprayer, then dissolve 5 g of soluble urea.
  - Spray both leaf faces in the morning. Physical smother — repeat after rain. Avoid hot sun on thin foliage.
  - 1 litre of soap at 10 ml/L makes 100 litres of spray (use about 500 g of the urea bag).
  - Do not mix with foliar copper or strong oxidisers.

### Levington Tomorite Concentrated Tomato Food

- URL: https://dupestack.co.uk/teardowns/levington-tomorite-concentrated-tomato-food-dupe/
- Brand: Levington
- Retail pack: 1 litre · £5.50 typical snapshot
- Labelled active: Liquid NPK 4-3-8 with seaweed extract (15%)
- Carrier: Water and seaweed liquor
- Bulk dupe: Soluble tomato fertiliser 4-4-8 (or 6-5-12)
- CAS: 66455-26-3
- Formula: N + P2O5 + K2O
- Bulk pack: 1 kg · £9.50
- Dilution: 2 g/L
- Cost per working litre: £0.02
- Indicative saving: 83% per litre
- PPE: gloves
- Mixing:
  - Wear gloves if you have broken skin. Dissolve 2 g of soluble tomato feed in 1 litre of water.
  - Feed once or twice a week from first truss, as you would a capful of Tomorite (typically 20 ml of the bottle per litre).
  - 1 kg at 2 g/L is about 500 litres of working feed. A 1 litre Tomorite bottle at 20 ml/L is 50 litres.
  - Optional: a pinch of Epsom salts (magnesium sulphate) if leaves yellow between veins.

### Westland Epsom Salts

- URL: https://dupestack.co.uk/teardowns/westland-epsom-salts-magnesium-sulphate-dupe/
- Brand: Westland
- Retail pack: 1.5 kg box · £6.50 typical snapshot
- Labelled active: Magnesium sulphate heptahydrate (100%)
- Carrier: None (crystals)
- Bulk dupe: Magnesium sulphate heptahydrate (Epsom salts)
- CAS: 10034-99-8
- Formula: MgSO4·7H2O
- Bulk pack: 5 kg · £8.99
- Dilution: 10 g/L as a foliar drench; 20 g/m² on soil
- Cost per working litre: £0.02
- Indicative saving: 59% per litre
- PPE: gloves
- Mixing:
  - Food/technical grade crystals. Dissolve 10 g in 1 litre for a foliar feed, or broadcast 20 g/m² around hungry tomatoes and water in.
  - 5 kg is more than three Westland boxes. Store dry — it cakes.
  - This corrects magnesium. It is not a complete fertiliser and it is not a medicine.

### Westland Sulphate of Ammonia

- URL: https://dupestack.co.uk/teardowns/westland-sulphate-of-ammonia-lawn-feed-dupe/
- Brand: Westland
- Retail pack: 1.5 kg box · £7.50 typical snapshot
- Labelled active: Ammonium sulphate (21%)
- Carrier: None (prills)
- Bulk dupe: Agricultural ammonium sulphate 21% N
- CAS: 7783-20-2
- Formula: (NH4)2SO4
- Bulk pack: 25 kg · £18.00
- Dilution: 35 g/m²
- Cost per working litre: £0.03
- Indicative saving: 64% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Wear gloves. Avoid breathing dust. Broadcast 35 g/m² on a dry lawn, then water in. Keep off ponds.
  - A 25 kg sack covers about 700 m² at 35 g/m². That is more than sixteen 1.5 kg boxes.
  - Do not mix with lime in the same pass. Store dry.

### Doff Slug & Snail Killer Pellets

- URL: https://dupestack.co.uk/teardowns/doff-slug-snail-killer-ferric-phosphate-dupe/
- Brand: Doff
- Retail pack: 800 g tub · £7.49 typical snapshot
- Labelled active: Ferric phosphate (1%)
- Carrier: Wheat bait and binders
- Bulk dupe: Ferric phosphate slug bait (~1% FePO4)
- CAS: 10045-86-0
- Formula: FePO4
- Bulk pack: 2.5 kg · £14.99
- Dilution: 5 g/m² scatter
- Cost per working litre: £0.03
- Indicative saving: 36% per litre
- PPE: gloves
- Mixing:
  - Scatter 5 g/m² around vulnerable plants, not in heaps. Keep pellets dry in the tub.
  - 2.5 kg at 5 g/m² covers about 500 m² — more than an 800 g tub (about 160 m² at the same rate).
  - Ferric phosphate is still a pesticide: follow the label on the bag you buy. Not metaldehyde. Keep away from pets that eat bait.

### Vitax Sequestered Iron Plant Tonic

- URL: https://dupestack.co.uk/teardowns/vitax-sequestered-iron-plant-tonic-dupe/
- Brand: Vitax
- Retail pack: 80 g (4 × 20 g sachets) · £6.99 typical snapshot
- Labelled active: Iron EDDHA / EDTA chelate with magnesium and manganese (6%)
- Carrier: Soluble salts in a sachet
- Bulk dupe: Fe-EDDHA 6% chelated iron (plus a pinch of Mg/Mn if you want the full tonic)
- CAS: 16455-61-1
- Formula: Fe-EDDHA
- Bulk pack: 250 g · £13.50
- Dilution: 2 g/L (20 g in a 10 L can, matching one sachet)
- Cost per working litre: £0.11
- Indicative saving: 38% per litre
- PPE: gloves
- Mixing:
  - Wear gloves if you have broken skin. The powder stains — it is meant to; that is the chelate, not rust sulphate spray.
  - Dissolve 20 g (one branded sachet, or 2 g/L) in a 10 litre watering can. Drench the root zone in spring.
  - 250 g is about 12 of those cans. Four sachets are four cans. Keep off pale stone if you hate orange drips.
  - This is a fertiliser chelate, not a pesticide. Follow the bag you buy.

### Westland Nitrate of Potash

- URL: https://dupestack.co.uk/teardowns/westland-nitrate-of-potash-tomato-feed-dupe/
- Brand: Westland
- Retail pack: 1.5 kg box · £5.99 typical snapshot
- Labelled active: Potassium nitrate (100%)
- Carrier: None (prills)
- Bulk dupe: Potassium nitrate 13-0-46 (nitrate of potash)
- CAS: 7757-79-1
- Formula: KNO3
- Bulk pack: 5 kg · £14.99
- Dilution: 1 g/L (weekly fruiting feed)
- Cost per working litre: £0.00
- Indicative saving: 25% per litre
- PPE: gloves
- Mixing:
  - Oxidiser — keep away from fuels and acids. Gloves if you have broken skin. Store dry.
  - Dissolve 1 g per litre of water as a weekly fruiting feed, or follow the 5 kg bag. That is the same salt as the 1.5 kg box.
  - 5 kg at 1 g/L is 5,000 litres of feed. A 1.5 kg box is 1,500 litres.
  - Oxidising fertiliser: do not mix into homemade fireworks. Garden use only.

## Household cleaning

### Vanish Oxi Action Fabric Stain Remover

- URL: https://dupestack.co.uk/teardowns/vanish-oxi-action/
- Brand: Vanish
- Retail pack: 1 kg tub · £9.00 typical snapshot
- Labelled active: Sodium percarbonate (100%)
- Carrier: Soda ash, surfactants and fragrance
- Bulk dupe: Sodium percarbonate (food/technical grade)
- CAS: 15630-89-4
- Formula: 2Na2CO3·3H2O2
- Bulk pack: 5 kg · £15.00
- Dilution: 20 g/L
- Cost per working litre: £0.30
- Indicative saving: 67% per litre
- PPE: gloves, goggles
- Mixing:
  - Oxidiser: keep away from acids, bleach (hypochlorite) and combustible materials. Wear gloves and goggles.
  - For a pre-soak, dissolve 20 g per litre of warm (not boiling) water. Submerge fabric for 1–6 hours.
  - For a machine boost, add 30–40 g to the drum with the detergent. Do not put powder in a bleach-dosing ball with acids.
  - Rinse thoroughly. Test colourfastness on a hidden seam first.
  - Store sealed and dry. Percarbonate cakes if it takes on moisture.

### Domestos Original Thick Bleach

- URL: https://dupestack.co.uk/teardowns/domestos-original/
- Brand: Domestos
- Retail pack: 750 millilitres · £2.20 typical snapshot
- Labelled active: Sodium hypochlorite (4.5%)
- Carrier: Water, thickener, surfactant, fragrance
- Bulk dupe: Household thin bleach (sodium hypochlorite ~5%)
- CAS: 7681-52-9
- Formula: NaOCl
- Bulk pack: 5 litres · £2.50
- Dilution: 1:9
- Cost per working litre: £0.05
- Indicative saving: 77% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Gloves and ventilation. Never mix bleach with acids, vinegar, toilet descalers or ammonia — chlorine gas.
  - For a toilet bowl, use neat thin bleach and leave 10 minutes, then flush.
  - For hard surfaces, 1 part bleach to 9 parts water. Make fresh; hypochlorite dies in the bottle once diluted.
  - Do not use on coloured fabrics, stone, or aluminium.
  - Store cool and dark, upright, away from children.

### Cillit Bang Limescale Destroyer

- URL: https://dupestack.co.uk/teardowns/cillit-bang-limescale/
- Brand: Cillit Bang
- Retail pack: 750 millilitres · £3.50 typical snapshot
- Labelled active: Citric and/or sulfamic acid (10%)
- Carrier: Water, surfactant, dye, fragrance
- Bulk dupe: Citric acid monohydrate (food grade)
- CAS: 5949-29-1
- Formula: C6H8O7·H2O
- Bulk pack: 1 kg · £6.50
- Dilution: 50 g/L
- Cost per working litre: £0.33
- Indicative saving: 89% per litre
- PPE: gloves, goggles
- Mixing:
  - Wear gloves. Acidic splash: goggles if you are spraying.
  - Dissolve 50 g per litre of warm water for taps, shower heads and kettles.
  - Soak or spray, dwell 15–30 minutes, rinse. Repeat on thick scale.
  - Do not mix with bleach. Avoid raw marble and limestone worktops.
  - For a kettle, 30 g in a full boil, sit 30 minutes, rinse twice.

### The Pink Stuff (StarDrops) The Miracle Cleaning Paste

- URL: https://dupestack.co.uk/teardowns/the-pink-stuff-miracle-cleaning-paste-dupe/
- Brand: The Pink Stuff (StarDrops)
- Retail pack: 850 g tub · £2.29 typical snapshot
- Labelled active: Precipitated calcium carbonate and sodium silicate (65%)
- Carrier: Vegetable soap, glycerine and rose perfume
- Bulk dupe: Precipitated calcium carbonate (chalk powder) + liquid castile soap
- CAS: 471-34-1
- Formula: CaCO3
- Bulk pack: 2.5 kg powder · £7.50
- Dilution: 3 parts chalk powder to 1 part liquid soap + splash of water to form paste
- Cost per working litre: £0.72
- Indicative saving: 68% per litre
- PPE: gloves
- Mixing:
  - Mix dry calcium carbonate powder with liquid vegetable soap in an airtight tub until a stiff paste forms.
  - Apply with a damp microfibre cloth or scrubbing sponge to sinks, pots or cooker glass.
  - Rinse residue cleanly with water.

### Astonish Specialist Mould & Mildew Remover

- URL: https://dupestack.co.uk/teardowns/astonish-specialist-mould-mildew-remover-dupe/
- Brand: Astonish
- Retail pack: 750 ml trigger · £2.00 typical snapshot
- Labelled active: Sodium hypochlorite and anionic surfactants (3.5%)
- Carrier: Water and fragrance
- Bulk dupe: Dairy-grade sodium hypochlorite 14% (diluted to 3.5%)
- CAS: 7681-52-9
- Formula: NaOCl
- Bulk pack: 5 litres · £16.50
- Dilution: 1 part 14% hypochlorite to 3 parts water
- Cost per working litre: £0.82
- Indicative saving: 69% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Pour 200 ml of 14% hypochlorite into an empty 1 L trigger spray bottle.
  - Top up with 600 ml of tap water and 1 teaspoon of standard washing-up liquid for surface cling.
  - Spray directly onto black mould in tile grout, leave for 10 minutes, and wipe clean.
  - Never mix with acids, vinegar or ammonia.

### Oven Pride Complete Oven Cleaning System

- URL: https://dupestack.co.uk/teardowns/oven-pride-complete-oven-cleaner-dupe/
- Brand: Oven Pride
- Retail pack: 500 millilitres · £4.00 typical snapshot
- Labelled active: Sodium hydroxide (caustic soda) (4%)
- Carrier: Water, thickener and the plastic bag
- Bulk dupe: Sodium hydroxide pearls 99% (caustic soda)
- CAS: 1310-73-2
- Formula: NaOH
- Bulk pack: 1 kg · £8.50
- Dilution: 40 g/L (about 4% w/v gel-strength liquor)
- Cost per working litre: £0.34
- Indicative saving: 96% per litre
- PPE: gloves, goggles, well-ventilated, acid-resistant
- Mixing:
  - Causes severe burns. Splash goggles, household gloves, ventilation. Always add pearls to cold water, never water onto a pile of pearls.
  - Dissolve 40 g of pearls in 1 litre of cold water in a plastic jug. That is about 4% NaOH — the same order of strength as the branded gel.
  - Apply to cold oven enamel with a nylon brush. Dwell 20–40 minutes. Rinse copiously. Keep off aluminium, zinc, and skin.
  - Never mix with acids or bleach. 1 kg makes about 25 litres of working liquor. The branded bag is optional theatre.

### Boots / first-aid brands Hydrogen Peroxide Solution 3%

- URL: https://dupestack.co.uk/teardowns/boots-hydrogen-peroxide-3-percent-dupe/
- Brand: Boots / first-aid brands
- Retail pack: 200 millilitres · £1.80 typical snapshot
- Labelled active: Hydrogen peroxide (3%)
- Carrier: Water and stabiliser (often phosphoric acid, ppm)
- Bulk dupe: Hydrogen peroxide 12% (40-volume cream peroxide / technical)
- CAS: 7722-84-1
- Formula: H2O2
- Bulk pack: 1 litre · £7.99
- Dilution: 1:3 (1 part 12% + 3 parts water → 3%)
- Cost per working litre: £2.00
- Indicative saving: 78% per litre
- PPE: gloves, goggles
- Mixing:
  - 12% burns skin. Gloves and goggles. Always add peroxide to water.
  - 1 part 12% + 3 parts water makes 3% (10-volume). 1 litre of 12% makes 4 litres of 3%.
  - Use 3% on hard surfaces and some stains. Do not mix with vinegar (peracetic acid) or bleach unless you know the chemistry.
  - A 200 ml first-aid bottle is £9/L of 3%. Diluted bulk is about £2/L of 3%.

### Oust All Purpose Descaler Sachets

- URL: https://dupestack.co.uk/teardowns/oust-all-purpose-descaler-lactic-acid-dupe/
- Brand: Oust
- Retail pack: 75 millilitres (3 × 25 ml sachets) · £3.50 typical snapshot
- Labelled active: Lactic acid (80%)
- Carrier: Water
- Bulk dupe: Lactic acid 80% (food / technical)
- CAS: 79-33-4
- Formula: C3H6O3
- Bulk pack: 1 litre · £11.99
- Dilution: 1:39 (25 ml in 1 L, matching one sachet per kettle)
- Cost per working litre: £0.30
- Indicative saving: 74% per litre
- PPE: gloves, goggles
- Mixing:
  - Gloves and goggles. Lactic acid burns eyes. Never mix with bleach or ammonia.
  - Measure 25 ml of 80% lactic acid into a kettle or reservoir, then fill to 1 litre with water. That matches one branded sachet.
  - Boil or dwell 20 minutes. Discard, rinse twice, and boil a full kettle of fresh water before drinking from it.
  - 1 litre of 80% makes about 40 kettle-strength fills. Keep off marble and unsealed stone.

### Fernox DS-3 Cleaner Descaler

- URL: https://dupestack.co.uk/teardowns/fernox-ds3-sulphamic-acid-descaler-dupe/
- Brand: Fernox
- Retail pack: 500 g tub · £14.50 typical snapshot
- Labelled active: Sulfamic acid (sulphamic acid) (99%)
- Carrier: None (crystals) with a corrosion-inhibitor pinch in some SKUs
- Bulk dupe: Sulfamic acid 99% (sulphamic acid crystals)
- CAS: 5329-14-6
- Formula: H3NSO3
- Bulk pack: 1 kg · £8.50
- Dilution: 50 g/L (about 5% w/v kettle / circuit liquor)
- Cost per working litre: £0.43
- Indicative saving: 71% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Irritant dust. Gloves, goggles, ventilation. Do not mix with bleach (chlorine gas) or nitric mixtures.
  - Dissolve 50 g of crystals in 1 litre of warm water. That is a typical 5% descaling liquor for a kettle or a small circuit.
  - Dwell 20–40 minutes. Rinse copiously. Keep off aluminium, zinc, marble and enamel where the supplier SDS warns.
  - 1 kg makes about 20 litres of 5% liquor. A 500 g branded tub is ten of those litres at a plumber’s label price.

### Jeyes Kleen Off Ammonia Multi-Purpose Cleaner

- URL: https://dupestack.co.uk/teardowns/jeyes-kleen-off-ammonia-household-cleaner-dupe/
- Brand: Jeyes
- Retail pack: 500 millilitres · £2.49 typical snapshot
- Labelled active: Ammonium hydroxide (9.5%)
- Carrier: Water
- Bulk dupe: Household ammonia 9–10% (ammonium hydroxide)
- CAS: 1336-21-6
- Formula: NH4OH
- Bulk pack: 5 litres · £8.99
- Dilution: 1:9 (about 1% working for glass and paintwork)
- Cost per working litre: £0.18
- Indicative saving: 64% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Corrosive fumes. Gloves, goggles, open windows. Never mix with bleach or acids — chloramine or heat.
  - For glass and paint: 1 part 10% ammonia + 9 parts water. Wipe with a lint-free cloth. Do not use on brass or aluminium if it dulls.
  - A saucer of neat 10% in a cold oven overnight is the old oven trick — ventilation afterwards. This is not Oven Pride (that is NaOH).
  - 5 litres of 10% makes about 50 litres of 1% working mix.

### Carex Complete Hand Sanitiser

- URL: https://dupestack.co.uk/teardowns/carex-complete-hand-sanitiser-ipa-dupe/
- Brand: Carex
- Retail pack: 500 millilitres · £3.00 typical snapshot
- Labelled active: Ethanol / isopropanol (alcohol) (70%)
- Carrier: Water, glycerin and a fragrance
- Bulk dupe: Isopropyl alcohol 99% (IPA) diluted to ~70%
- CAS: 67-63-0
- Formula: C3H8O
- Bulk pack: 5 litres · £15.99
- Dilution: 7:3 (7 parts 99% IPA + 3 parts water → ~70%)
- Cost per working litre: £2.24
- Indicative saving: 63% per litre
- PPE: gloves, well-ventilated
- Mixing:
  - Highly flammable. No flames, no charging phones beside an open bottle. Gloves if you have broken skin. Do not drink.
  - 7 parts 99% IPA + 3 parts water makes about 70% v/v. Optional: 1–2% vegetable glycerin so hands crack less.
  - 5 litres of 99% makes about 7.1 litres of 70% sanitiser. A 500 ml Carex pump is one-fourteenth of that.
  - This is a household disinfectant comparison, not medical advice and not a licensed antiseptic.

## Pool & spa

### Clearwater pH Plus Spa / Pool Balancer

- URL: https://dupestack.co.uk/teardowns/clearwater-ph-plus/
- Brand: Clearwater
- Retail pack: 1 kg bottle · £11.50 typical snapshot
- Labelled active: Sodium carbonate (soda ash) (99%)
- Carrier: None (dense soda ash)
- Bulk dupe: Dense soda ash (sodium carbonate 99%)
- CAS: 497-19-8
- Formula: Na2CO3
- Bulk pack: 5 kg · £13.50
- Dilution: 1 g/L
- Cost per working litre: £0.00
- Indicative saving: 76% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Alkaline dust: wear gloves and goggles. Avoid inhaling powder; mix downwind or outdoors.
  - Test pH first. A typical spa dose is about 1 g per litre of water (1 kg per 1,000 L) as a starting correction — always titrate.
  - Predissolve granules in a plastic bucket of spa water, then distribute around the circulation return. Never dump onto the liner dry.
  - Run the pump, retest after 30–60 minutes, and add more only if pH remains below 7.2.
  - Store dry. Sodium carbonate cakes when damp.

### Clearwater pH Minus

- URL: https://dupestack.co.uk/teardowns/clearwater-ph-minus/
- Brand: Clearwater
- Retail pack: 1.5 kg · £9.99 typical snapshot
- Labelled active: Sodium bisulphate (dry acid) (95%)
- Carrier: None
- Bulk dupe: Sodium bisulphate (dry acid)
- CAS: 7681-38-1
- Formula: NaHSO4
- Bulk pack: 5 kg · £14.50
- Dilution: 0.5 g/L
- Cost per working litre: £0.00
- Indicative saving: 56% per litre
- PPE: gloves, goggles, well-ventilated, acid-resistant
- Mixing:
  - Corrosive solid. Gloves, goggles, ventilation. Add acid to water, never water to acid.
  - Test pH. A cautious spa starting dose is about 0.5 g per litre — then retest. Do not dump a whole tub.
  - Predissolve in a plastic bucket of spa water and feed in front of a return jet.
  - Wait 30 minutes with the pump running before adding more.
  - Store dry, away from chlorine tablets (incompatible stack).

### Clearwater Multifunction Chlorine Tablets

- URL: https://dupestack.co.uk/teardowns/clearwater-chlorine-tablets/
- Brand: Clearwater
- Retail pack: 5 kg · £42.00 typical snapshot
- Labelled active: Trichloroisocyanuric acid (TCCA) (90%)
- Carrier: Stabiliser and tableting aids
- Bulk dupe: TCCA 90% chlorine tablets (200 g)
- CAS: 87-90-1
- Formula: C3Cl3N3O3
- Bulk pack: 5 kg · £24.00
- Dilution: 2 g/m³ as Cl2 (guide)
- Cost per working litre: £0.00
- Indicative saving: 43% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Oxidiser and irritant. Gloves and goggles. Never mix with other pool chemicals in a bucket.
  - Dose in a floater or feeder, not mixed dry with shock or acid.
  - Typical spa maintenance is a fraction of a 20–200 g tablet — follow a test kit, not a marketing schedule.
  - Watch cyanuric acid (stabiliser) build-up; drain and refill if CYA climbs out of range.
  - Store cool, dry, and away from organics and acids.

### Clearwater Total Alkalinity TA Plus

- URL: https://dupestack.co.uk/teardowns/clearwater-total-alkalinity-plus-dupe/
- Brand: Clearwater
- Retail pack: 1 kg tub · £11.99 typical snapshot
- Labelled active: Sodium bicarbonate (100%)
- Carrier: None (pure salt)
- Bulk dupe: Food / technical grade sodium bicarbonate
- CAS: 144-55-8
- Formula: NaHCO3
- Bulk pack: 25 kg sack · £19.50
- Dilution: 18 g per 1,000 L raises total alkalinity by 10 ppm
- Cost per working litre: £0.78
- Indicative saving: 93% per litre
- PPE: gloves, goggles
- Mixing:
  - Test water with standard test strips to establish baseline TA (ideal range: 80–120 ppm).
  - Dissolve the required weight of sodium bicarbonate in a clean bucket of warm spa water.
  - Pour slowly around the perimeter with the circulation pumps running.

### Fi-Clor Hardness Plus (Calcium Increaser)

- URL: https://dupestack.co.uk/teardowns/ficlor-hardness-plus-calcium-increaser-dupe/
- Brand: Fi-Clor
- Retail pack: 1 kg bottle · £13.99 typical snapshot
- Labelled active: Calcium chloride anhydrous / dihydrate (77%)
- Carrier: Mineral binders
- Bulk dupe: Calcium chloride flakes (77–80% technical grade)
- CAS: 10043-52-4
- Formula: CaCl2
- Bulk pack: 25 kg sack · £21.00
- Dilution: 15 g per 1,000 L raises calcium hardness by 10 ppm
- Cost per working litre: £0.84
- Indicative saving: 94% per litre
- PPE: gloves, goggles
- Mixing:
  - Pre-dissolve flakes thoroughly in cold water (the dissolution reaction produces heat).
  - Add in small increments with the circulation pump active to avoid local clouding.

### Clearwater Chlorine Stabiliser & UV Shield

- URL: https://dupestack.co.uk/teardowns/clearwater-chlorine-stabiliser-cyanuric-acid-dupe/
- Brand: Clearwater
- Retail pack: 1 kg tub · £16.50 typical snapshot
- Labelled active: Cyanuric acid (100%)
- Carrier: None (granules)
- Bulk dupe: Technical cyanuric acid granules
- CAS: 108-80-5
- Formula: C3H3N3O3
- Bulk pack: 5 kg · £18.00
- Dilution: 0.015 g/L (15 g/m³ for +15 ppm CYA)
- Cost per working litre: £0.00
- Indicative saving: 78% per litre
- PPE: gloves, goggles
- Mixing:
  - Wear gloves and goggles. 150 g in 10,000 litres raises CYA by about 15 ppm. Ideal outdoor range is usually 30–50 ppm — test first.
  - Place granules in a skimmer sock or mesh bag in the skimmer. Run the filter until dissolved (often 24–48 hours). Do not dump on the liner.
  - 5 kg is five 1 kg spa tubs. Store dry, away from chlorine shock in the same bucket.

### Lo-Chlor No More Scale Inhibitor

- URL: https://dupestack.co.uk/teardowns/lo-chlor-scale-and-stain-inhibitor-dupe/
- Brand: Lo-Chlor
- Retail pack: 1 litre · £24.50 typical snapshot
- Labelled active: HEDP (etidronic acid) (15%)
- Carrier: Demineralised water
- Bulk dupe: HEDP 60% phosphonate concentrate
- CAS: 2809-21-4
- Formula: C2H8O7P2
- Bulk pack: 5 litres · £21.00
- Dilution: 0.005 g/L (50 ml per 10,000 L)
- Cost per working litre: £0.00
- Indicative saving: 83% per litre
- PPE: gloves, goggles
- Mixing:
  - Wear gloves and goggles. Add 50 ml of 60% HEDP per 10,000 litres near a return jet, once a month as a guide.
  - Hard-water fill: a double first dose is common, then test and watch the salt cell. This is a sequesterant, not a descaler for thick scale.
  - 5 litres at 50 ml per 10 m³ is about 100 monthly doses. Do not mix in a bucket with chlorine or acid.

### Fi-Clor Superfast Shock Chlorine Granules

- URL: https://dupestack.co.uk/teardowns/ficlor-superfast-calcium-hypochlorite-shock-dupe/
- Brand: Fi-Clor
- Retail pack: 2.5 kg tub · £34.00 typical snapshot
- Labelled active: Calcium hypochlorite (70%)
- Carrier: Stabilisers and anti-caking salts
- Bulk dupe: Calcium hypochlorite granules 65–70%
- CAS: 7778-54-3
- Formula: Ca(OCl)2
- Bulk pack: 5 kg · £26.00
- Dilution: 0.01 g/L (10 g/m³ for ~7 ppm free chlorine)
- Cost per working litre: £0.00
- Indicative saving: 62% per litre
- PPE: gloves, goggles, well-ventilated
- Mixing:
  - Oxidiser. Gloves, goggles, never mix with acids, TCCA or oil. Pre-dissolve in a plastic bucket of pool water, then distribute.
  - About 10 g per m³ (10 g per 1,000 litres) raises free chlorine by roughly 7 ppm as a shock — test, do not guess.
  - Cal-hypo raises hardness. It does not add cyanuric acid (unlike TCCA tablets). Store dry, away from acid and organics.
  - 5 kg is two 2.5 kg branded tubs. Per kilo this is the cheaper pour.

### Clearwater Non-Chlorine Shock / Spa Oxidiser

- URL: https://dupestack.co.uk/teardowns/clearwater-non-chlorine-shock-mps-dupe/
- Brand: Clearwater
- Retail pack: 1 kg tub · £18.99 typical snapshot
- Labelled active: Potassium peroxymonosulphate (MPS) (85%)
- Carrier: Potassium sulphate and potassium hydrogen sulphate (triple salt)
- Bulk dupe: Potassium monopersulphate triple salt (MPS)
- CAS: 70693-62-8
- Formula: KHSO5
- Bulk pack: 5 kg · £28.00
- Dilution: 0.012 g/L (12 g/m³ as a typical spa shock)
- Cost per working litre: £0.00
- Indicative saving: 71% per litre
- PPE: gloves, goggles
- Mixing:
  - Wear gloves and goggles. Broadcast 12 g per m³ (about 12 g per 1,000 litres) with the pump running. Do not mix in a bucket with chlorine.
  - MPS is an oxidiser, not a residual sanitiser. Keep bromine or chlorine in range.
  - 5 kg is five 1 kg spa tubs. Store dry. Test after shocking — some kits read MPS as chlorine.

### Clearwater Bromine Tablets

- URL: https://dupestack.co.uk/teardowns/clearwater-bromine-tablets-bcdmh-dupe/
- Brand: Clearwater
- Retail pack: 1 kg tub · £24.00 typical snapshot
- Labelled active: BCDMH (1-bromo-3-chloro-5,5-dimethylhydantoin) (96%)
- Carrier: Tablet binder
- Bulk dupe: BCDMH bromine tablets 20 g
- CAS: 16079-88-2
- Formula: C5H6BrClN2O2
- Bulk pack: 5 kg · £55.00
- Dilution: 1–2 tablets in a floater; maintain 3–5 ppm bromine
- Cost per working litre: £0.01
- Indicative saving: 54% per litre
- PPE: gloves, goggles
- Mixing:
  - Gloves and goggles. Do not mix with cal-hypo or acid in a bucket. Tablets go in a floating dispenser, not loose on the acrylic.
  - Typical spa start is one or two 20 g tablets; then test. Target 3–5 ppm bromine in hot water.
  - 5 kg is five 1 kg tubs. Store dry. This is a sanitiser, not a fragrance.

### HTH / Fi-Clor Rapidfloc / Granular Floc

- URL: https://dupestack.co.uk/teardowns/hth-ficlor-granular-floc-aluminium-sulphate-dupe/
- Brand: HTH / Fi-Clor
- Retail pack: 1 kg tub · £12.99 typical snapshot
- Labelled active: Aluminium sulphate (99%)
- Carrier: None (alum crystals)
- Bulk dupe: Aluminium sulphate (alum) crystals 17%
- CAS: 10043-01-3
- Formula: Al2(SO4)3
- Bulk pack: 5 kg · £12.00
- Dilution: 0.025 g/L (25 g/m³ after a shock, vacuum to waste)
- Cost per working litre: £0.00
- Indicative saving: 77% per litre
- PPE: gloves, goggles
- Mixing:
  - Acidic dust. Gloves and goggles. Predissolve in a bucket of pool water. Not for cartridge or DE filters as a filter-aid without the supplier note.
  - A typical drop-out dose is about 25 g per cubic metre. Stop the pump, let the floc settle overnight, vacuum to waste.
  - pH should be near 7.2–7.6 or alum will not drop cleanly. Test, then floc — do not guess.
  - 5 kg treats about 200 m³ at 25 g/m³. A 1 kg branded tub is 40 m³.

### Fi-Clor / Swimfresh Chlorine / Bromine Reducer

- URL: https://dupestack.co.uk/teardowns/ficlor-chlorine-bromine-reducer-thiosulphate-dupe/
- Brand: Fi-Clor / Swimfresh
- Retail pack: 2.5 kg tub · £16.50 typical snapshot
- Labelled active: Sodium thiosulphate (99%)
- Carrier: None (pentahydrate or anhydrous powder)
- Bulk dupe: Sodium thiosulphate pentahydrate (chlorine reducer)
- CAS: 7772-98-7
- Formula: Na2S2O3·5H2O
- Bulk pack: 5 kg · £11.50
- Dilution: 0.003 g/L (about 3 g/m³ per ppm to knock down — titrate)
- Cost per working litre: £0.00
- Indicative saving: 65% per litre
- PPE: gloves
- Mixing:
  - Gloves. Predissolve. Never mix dry with oxidisers in a bucket — that is a heat hazard.
  - Test free chlorine first. A starting correction is on the order of 3 g per cubic metre per ppm you want to remove. Retest. Do not dump the tub.
  - 5 kg is a season of corrections for a domestic pool. A 2.5 kg branded tub is half of that at spa-shop money.
  - If you overshoot, you have no sanitiser. Shock back. This is not a substitute for waiting overnight after a modest shock.

## Wellness & supplements

### Berocca Original

- URL: https://dupestack.co.uk/teardowns/berocca-original/
- Brand: Berocca
- Retail pack: 45 tablets (22.5 g vitamin C) · £10.00 typical snapshot
- Labelled active: Ascorbic acid (vitamin C) with B vitamins (100%)
- Carrier: Citric acid, carbonates, sweeteners, flavour
- Bulk dupe: Ascorbic acid (vitamin C), food grade
- CAS: 50-81-7
- Formula: C6H8O6
- Bulk pack: 1 kg · £11.00
- Dilution: 500 mg in 250 ml
- Cost per working litre: £0.02
- Indicative saving: 91% per litre
- PPE: gloves
- Mixing:
  - This is a food supplement comparison, not a medicine. Do not exceed NHS/EFSA guidance without professional advice.
  - A typical Berocca-style C dose is about 500 mg. That is 0.5 g of ascorbic acid in a glass of water, with optional bulk B-complex if you want the rest of the stack.
  - Ascorbic acid is sour; a pinch of bicarbonate takes the edge off, as the fizzy tablet does.
  - 1 kg of powder is 2,000 × 500 mg portions. Keep it dry and away from light.
  - If you are pregnant, on medication, or have a condition, speak to a pharmacist — do not self-stack megadoses.

### BetterYou Magnesium Oil Spray

- URL: https://dupestack.co.uk/teardowns/betteryou-magnesium-oil/
- Brand: BetterYou
- Retail pack: 100 millilitres · £12.95 typical snapshot
- Labelled active: Magnesium chloride (31%)
- Carrier: Water
- Bulk dupe: Magnesium chloride hexahydrate flakes
- CAS: 7791-18-6
- Formula: MgCl2·6H2O
- Bulk pack: 1 kg · £8.99
- Dilution: 300 g/L
- Cost per working litre: £2.70
- Indicative saving: 79% per litre
- PPE: gloves
- Mixing:
  - Food/bath-grade flakes, not an injectable. Not medical advice.
  - For a spray-style ‘oil’, dissolve about 300 g of flakes per litre of hot water, cool, and bottle in a clean atomiser. That is a strong brine; dilute further if it stings.
  - A 1 kg bag makes roughly 3 L of that concentrate — versus 100 ml at nearly £13.
  - Patch-test. Rinse if skin burns. Do not apply to broken skin.
  - Store the dry flakes sealed; they pull water from the air.

### LMNT Electrolyte Drink Mix

- URL: https://dupestack.co.uk/teardowns/lmnt-recharge-electrolyte-drink-mix-dupe/
- Brand: LMNT
- Retail pack: 30 sachets (180 g total) · £42.00 typical snapshot
- Labelled active: Sodium chloride, potassium chloride, magnesium malate (100%)
- Carrier: Citric acid, stevia and natural flavours
- Bulk dupe: DIY high-potency electrolyte raw stack
- CAS: 7647-14-5 / 7447-40-7
- Formula: NaCl + KCl + C4H4MgO5
- Bulk pack: 3-month supply (90 servings) · £16.90
- Dilution: 2.5 g fine rock salt (1,000 mg Na) + 380 mg potassium chloride (200 mg K) + 400 mg magnesium malate (60 mg Mg) in 750 ml water
- Cost per working litre: £0.08
- Indicative saving: 92% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine.
  - Batch mix: 250 g pure pink rock salt, 38 g potassium chloride powder, and 40 g magnesium malate powder in a jar.
  - Scoop 1 level teaspoon (~3.3 g) into a water bottle with fresh lemon juice and a dash of sweetener.

### Ryze Organic Mushroom Coffee

- URL: https://dupestack.co.uk/teardowns/ryze-organic-mushroom-coffee-dupe/
- Brand: Ryze
- Retail pack: 30 servings (180 g bag) · £38.00 typical snapshot
- Labelled active: Lion’s mane, cordyceps, reishi, chaga, shiitake and turkey tail powder (33%)
- Carrier: Instant Arabica coffee and MCT coconut oil
- Bulk dupe: 8-in-1 dual-extracted mushroom extract (30%+ beta-glucans)
- CAS: not disclosed
- Formula: —
- Bulk pack: 100 g pure extract powder (50 servings) · £18.99
- Dilution: 2 g pure extract stirred into your own quality fresh-ground or instant coffee
- Cost per working litre: £0.38
- Indicative saving: 70% per litre
- PPE: none listed
- Mixing:
  - Add ½ teaspoon (2 g) of pure hot-water dual-extracted mushroom powder directly into your daily morning coffee or tea.
  - Whisk with a dash of milk or MCT oil.
  - This is a food supplement, not a medicine.

### Bloom Nutrition Greens & Superfoods Powder

- URL: https://dupestack.co.uk/teardowns/bloom-nutrition-greens-and-superfoods-dupe/
- Brand: Bloom Nutrition
- Retail pack: 180 g (30 servings) · £32.45 typical snapshot
- Labelled active: Proprietary superfood and enzyme blend (100%)
- Carrier: Maltodextrin, citric acid, stevia
- Bulk dupe: Spirulina–chlorella powder + soluble inulin + enzyme stack
- CAS: 9005-80-5
- Formula: —
- Bulk pack: 3-month supply (90 servings) · £22.00
- Dilution: 3 g organic spirulina/chlorella + 5 g pure inulin fibre in 300 ml water
- Cost per working litre: £0.24
- Indicative saving: 74% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine.
  - Mix 1 teaspoon of bulk 50/50 spirulina–chlorella powder with 1 scoop of prebiotic inulin into water or a morning smoothie.
  - Take alongside a standard multi-enzyme complex if you want the digestive stack; do not exceed the labelled dose.

### Lemme Purr Vaginal Health Gummies

- URL: https://dupestack.co.uk/teardowns/lemme-purr-vaginal-probiotic-gummies-dupe/
- Brand: Lemme
- Retail pack: 60 gummies (30 servings) · £38.99 typical snapshot
- Labelled active: Lactobacillus reuteri and vitamin C (10%)
- Carrier: Tapioca syrup, cane sugar, pectin, water
- Bulk dupe: Targeted women’s flora probiotic (50 billion CFU) + bromelain
- CAS: 50-81-7 / 9001-00-7
- Formula: —
- Bulk pack: 60 delayed-release capsules (60-day supply) · £16.50
- Dilution: 1 capsule daily with water
- Cost per working litre: £0.28
- Indicative saving: 78% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. It is not a treatment for infection.
  - Take 1 delayed-release capsule daily, 30 minutes before breakfast, with a large glass of water.
  - If you are pregnant, on medication, or have a diagnosed condition, speak to a pharmacist before starting a probiotic.

### Viral TikTok brands Pure Himalayan Shilajit Resin

- URL: https://dupestack.co.uk/teardowns/viral-himalayan-shilajit-resin-dupe/
- Brand: Viral TikTok brands
- Retail pack: 30 g jar (30-day supply) · £48.00 typical snapshot
- Labelled active: Fulvic acid and trace mineral pitch (100%)
- Carrier: None
- Bulk dupe: Standardised 50% fulvic acid shilajit extract + zinc & boron stack
- CAS: 479-66-3
- Formula: —
- Bulk pack: 90 capsules (3-month supply) · £17.50
- Dilution: 500 mg standardised extract (yielding 250 mg fulvic acid) daily
- Cost per working litre: £0.19
- Indicative saving: 88% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. Resin jars are unregulated; buy tested extract only.
  - Take 1 capsule of third-party-tested, standardised shilajit extract with your morning meal, alongside 15 mg zinc picolinate if you want the mineral stack.
  - Do not exceed labelled zinc doses. Discard any resin product without a published heavy-metal test.

### Beam Dream Nighttime Sleep Powder

- URL: https://dupestack.co.uk/teardowns/beam-dream-sleep-powder-dupe/
- Brand: Beam
- Retail pack: 30-serving pouch · £72.00 typical snapshot
- Labelled active: Magnesium citrate, L-theanine, reishi, melatonin (30%)
- Carrier: Cocoa powder, coconut milk powder, stevia
- Bulk dupe: Magnesium bisglycinate + free-form L-theanine + tart cherry extract
- CAS: 14783-68-7 / 3081-61-6
- Formula: C4H8MgN2O4 + C7H14N2O3
- Bulk pack: 60-day supply stack · £21.00
- Dilution: 2.5 g magnesium bisglycinate (300 mg elemental Mg) + 200 mg L-theanine in 200 ml warm oat milk
- Cost per working litre: £0.35
- Indicative saving: 85% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. It will not treat insomnia.
  - Whisk 2.5 g unflavoured magnesium bisglycinate and 200 mg L-theanine powder into 200 ml warm milk or chamomile tea, 45 minutes before sleep.
  - Bisglycinate is gentler on the gut than citrate. Start on the low side if you are new to magnesium.

### Artisan sea moss brands Wildcrafted Gold Sea Moss Gel

- URL: https://dupestack.co.uk/teardowns/viral-raw-sea-moss-gel-dupe/
- Brand: Artisan sea moss brands
- Retail pack: 500 ml jar (14-day supply) · £28.00 typical snapshot
- Labelled active: Chondrus crispus (hydrated seaweed gel) (10%)
- Carrier: 90% water / spring water
- Bulk dupe: Dried organic Irish sea moss (DIY gel) / bladderwrack kelp stack
- CAS: 9000-07-1
- Formula: —
- Bulk pack: 250 g raw dry moss (yields 4–5 litres of gel) · £12.50
- Dilution: 50 g dry moss soaked and blended with 800 ml warm spring water
- Cost per working litre: £0.18
- Indicative saving: 89% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. Seaweed is a source of iodine; do not megadose if you have thyroid disease.
  - Rinse 50 g of dried sea moss thoroughly to remove residual ocean salt.
  - Soak in spring water with a squeeze of lime for 12 hours.
  - Blend with 800 ml fresh warm water on high until silky. Pour into jars and refrigerate to set.

### Viral candy brands Creatine Monohydrate Daily Gummies

- URL: https://dupestack.co.uk/teardowns/viral-creatine-monohydrate-gummies-dupe/
- Brand: Viral candy brands
- Retail pack: 60 gummies (30 × 3 g servings) · £28.00 typical snapshot
- Labelled active: Creatine monohydrate (15%)
- Carrier: Glucose syrup, sugar, gelatin, citric acid and flavouring
- Bulk dupe: Micronised creatine monohydrate (200 mesh)
- CAS: 6020-87-7
- Formula: C4H9N3O2
- Bulk pack: 1 kg (200 × 5 g servings) · £19.99
- Dilution: 5 g in 300 ml
- Cost per working litre: £0.33
- Indicative saving: 89% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. 5 g daily is a common sports-nutrition amount — not a prescription, and not a reason to ignore a clinician.
  - Stir 5 g (one flat scoop) into 300 ml of water or squash once a day. 1 kg is 200 of those servings.
  - Gummies often under-dose and add sugar. Powder is the same molecule without the sweet.

### Viral health drops High-Strength Berberine Complex

- URL: https://dupestack.co.uk/teardowns/viral-berberine-hcl-metabolism-dupe/
- Brand: Viral health drops
- Retail pack: 60 capsules (300 mg each) · £34.00 typical snapshot
- Labelled active: Berberine hydrochloride (60%)
- Carrier: Rice flour and magnesium stearate
- Bulk dupe: Berberine HCl 500 mg capsules
- CAS: 633-65-8
- Formula: C20H18ClNO4
- Bulk pack: 120 capsules (500 mg) · £14.50
- Dilution: 500 mg twice daily with food (capsule, not a drink)
- Cost per working litre: £0.24
- Indicative saving: 79% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. Berberine can interact with medicines and is not a substitute for prescribed GLP-1 drugs. Speak to a pharmacist or GP.
  - A common labelled adult pattern is 500 mg twice daily with meals — follow the bottle you buy, not this page as a dose.
  - Optional Ceylon cinnamon is flavour and folklore, not a proven replacement for the capsule.

### Mielle Rosemary Mint Scalp & Hair Strengthening Oil

- URL: https://dupestack.co.uk/teardowns/mielle-rosemary-mint-scalp-hair-oil-dupe/
- Brand: Mielle
- Retail pack: 59 millilitres · £11.50 typical snapshot
- Labelled active: Rosemary leaf oil (1.5%)
- Carrier: Soybean, castor, jojoba and peppermint oils
- Bulk dupe: Rosemary essential oil (Rosmarinus officinalis)
- CAS: 8000-25-7
- Formula: —
- Bulk pack: 30 ml essential oil (plus 500 ml carrier in the stack) · £12.00
- Dilution: 2% in carrier (about 25 drops per 50 ml)
- Cost per working litre: £2.40
- Indicative saving: 89% per litre
- PPE: none listed
- Mixing:
  - This is a cosmetic comparison, not a hair-loss medicine. Patch-test. Keep essential oils off eyes and out of reach of children.
  - Fill a 50 ml dropper with sweet almond or jojoba oil. Add about 25 drops of rosemary essential oil (about 2%). Optional peppermint: 1–2 drops only.
  - Massage into the scalp two or three times a week. 30 ml of essential oil at 2% makes well over a litre of scalp oil.

### Viral candy brands Daily Collagen Beauty Gummies

- URL: https://dupestack.co.uk/teardowns/viral-collagen-peptides-gummies-dupe/
- Brand: Viral candy brands
- Retail pack: 60 gummies (30 × ~2.5 g servings) · £24.99 typical snapshot
- Labelled active: Hydrolysed collagen peptides (20%)
- Carrier: Glucose syrup, sugar, pectin and flavour
- Bulk dupe: Hydrolysed collagen peptides (bovine or marine)
- CAS: 92113-31-0
- Formula: —
- Bulk pack: 400 g (40 × 10 g servings) · £16.99
- Dilution: 10 g in 250 ml water or coffee
- Cost per working litre: £1.70
- Indicative saving: 80% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine or a skin treatment. Stir 10 g into 250 ml of cold water, coffee or soup once a day.
  - 400 g is 40 of those servings. Gummies usually under-dose and add sugar.
  - Pick a bag with a published peptide size (e.g. 2–5 kDa) if you care; the molecule is still collagen hydrolysate.

### BetterYou DLux 3000 Vitamin D Oral Spray

- URL: https://dupestack.co.uk/teardowns/betteryou-dlux-vitamin-d3-oral-spray-dupe/
- Brand: BetterYou
- Retail pack: 15 millilitres (about 100 sprays) · £9.95 typical snapshot
- Labelled active: Cholecalciferol (vitamin D3) (0.3%)
- Carrier: Coconut oil, peppermint oil, stevia and xylitol
- Bulk dupe: Cholecalciferol (vitamin D3) 4,000 IU capsules
- CAS: 67-97-0
- Formula: C27H44O
- Bulk pack: 365 capsules · £11.50
- Dilution: 1 capsule daily with food
- Cost per working litre: £0.13
- Indicative saving: 72% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. Do not exceed NHS/SACN advice without a clinician. Vitamin D is fat-soluble.
  - A common labelled adult pattern in winter is one 4,000 IU capsule daily with a meal. That is the same molecule as the spray.
  - 365 capsules is a year. The 15 ml spray is a few weeks at a typical two-spray dose.

### Viral candy brands / Hairburst-style Biotin Hair, Skin & Nails Gummies

- URL: https://dupestack.co.uk/teardowns/viral-biotin-hair-gummies-dupe/
- Brand: Viral candy brands / Hairburst-style
- Retail pack: 60 gummies (30 × 2 gummies) · £18.00 typical snapshot
- Labelled active: Biotin (vitamin B7) (0.25%)
- Carrier: Glucose syrup, sugar, gelatin and flavouring
- Bulk dupe: Biotin (vitamin B7) 1,000 µg tablets
- CAS: 58-85-5
- Formula: C10H16N2O3S
- Bulk pack: 365 tablets (1,000 µg) · £7.99
- Dilution: 1 tablet daily with food
- Cost per working litre: £0.09
- Indicative saving: 89% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine and not a hair-loss drug. High-dose biotin can interfere with some lab blood tests — tell your GP.
  - A common labelled adult pattern is one 1,000 µg tablet daily. That is already 20× NRV. You do not need a 10,000 µg gummy to ‘match’ a sweets tub.
  - 365 tablets is a year. A 60-count gummy tub is a month of sugar.

### Viral wellness candy Ashwagandha Stress & Sleep Gummies

- URL: https://dupestack.co.uk/teardowns/viral-ashwagandha-gummies-ksm66-dupe/
- Brand: Viral wellness candy
- Retail pack: 60 gummies (30 × 2 gummies) · £22.00 typical snapshot
- Labelled active: Withania somnifera root extract (withanolides) (2%)
- Carrier: Glucose syrup, sugar, pectin and flavouring
- Bulk dupe: Ashwagandha root extract 600 mg capsules (standardised / KSM-66 style)
- CAS: 90147-43-6
- Formula: —
- Bulk pack: 60 capsules (600 mg) · £14.50
- Dilution: 1 capsule daily with food (follow the bottle)
- Cost per working litre: £0.48
- Indicative saving: 67% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. Ashwagandha can interact with thyroid, sedative and autoimmune conditions. Speak to a pharmacist if you take medicines or are pregnant.
  - A common labelled adult pattern is 600 mg of standardised extract once daily — follow the pack you buy, not this page as a dose.
  - 60 capsules match a gummy month without the sugar load. Powder is cheaper still if you can weigh 600 mg.

### Viral kids-and-adult candy Omega-3 DHA Gummies

- URL: https://dupestack.co.uk/teardowns/viral-omega3-fish-oil-gummies-dupe/
- Brand: Viral kids-and-adult candy
- Retail pack: 60 gummies (30 × 2 gummies) · £16.00 typical snapshot
- Labelled active: EPA / DHA (fish or algal oil) (8%)
- Carrier: Sugar, gelatin and lemon flavour masking fish oil
- Bulk dupe: Fish oil 1,000 mg capsules (EPA/DHA)
- CAS: 8016-13-5
- Formula: —
- Bulk pack: 90 capsules (1,000 mg) · £8.50
- Dilution: 1 capsule daily with food
- Cost per working litre: £0.19
- Indicative saving: 81% per litre
- PPE: none listed
- Mixing:
  - This is a food-supplement comparison, not a medicine. People on anticoagulants should ask a pharmacist before high-dose fish oil.
  - A common labelled adult pattern is one 1,000 mg capsule daily with a meal. That is usually more EPA/DHA than two gummies.
  - 90 capsules outlast a 60-count gummy tub. Refrigerate opened oil if the bottle says so.