Lawn & garden
Doff Slug & Snail Killer Pellets dupe
Why pay around £7.49 for Doff? The bulk active is Ferric phosphate slug bait (~1% FePO4) — 36% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Doff Slug & Snail Killer Pellets
800 g tub · £7.49 typical snapshot
Wheat bait and binders
2 · Active
Ferric phosphate
1% on the label
10045-86-0FePO4
Bulk Ferric phosphate slug bait (~1% FePO4)
3 · Mix
5 g/m² scatter
£0.03 per working litre · 36% less than the shelf pack
- Active
- Ferric phosphate
- CAS
- 10045-86-0
- Dupe
- Ferric phosphate slug bait (~1% FePO4)
- Saving
- 36% / L
Saving is per litre of working-strength mix versus a typical pack price, not versus the DIY kit total. Shop prices move — always check the listing.
Label teardown
What the pack promises versus what the label chemistry actually is.
The marketing claim
“Organic gardening approved”
The chemical reality
Metaldehyde is gone. What remains is ~1% ferric phosphate in a cereal pellet. The 800 g tub is a small bag of the same bait sold in 2–5 kg buckets to allotmenteers. You are paying for the child-resistant lid.
Active vs filler
1% Ferric phosphate · 99% carrier / filler — Wheat bait and binders
- Typical retail
- £7.49
- 800 g tub
- Estimated active cost
- £4.80
- Scaled from bulk £14.99 / 2.5 kg
- Indicative markup
- 1.6×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 800 g tub pack of Doff Slug & Snail Killer Pellets typically retails around £7.49 in lawn & garden. That is a UK shelf-price snapshot for the maths on this page — not a live shop quote or a manufacturer RRP. Listings, sizes and deals move. The marketing line is that you are buying a finished lifestyle product, not a weighed chemical.
On the pack: Organic gardening approved; and Safe around edible crops up to harvest.
The catch: Metaldehyde is gone. What remains is ~1% ferric phosphate in a cereal pellet. The 800 g tub is a small bag of the same bait sold in 2–5 kg buckets to allotmenteers. You are paying for the child-resistant lid.
- “Organic gardening approved”
- “Safe around edible crops up to harvest”
Proprietary Blend & Dosage Breakdown
The labelled active is Ferric phosphate at 1%. Everything else in the pack is wheat bait and binders.
At 1% active, most of what you pay for is carrier and packaging. The brand is selling convenience, fragrance and a label — not a uniquely potent molecule.
Branded working strength is whatever comes out of the bottle. The bulk alternative is 1% Ferric phosphate slug bait (~1% FePO4), mixed to 5 g/m² scatter.
- Labelled active
- Ferric phosphate
- 1%
- Carrier
- Wheat bait and binders
- Retail pack
- 800 g tub · £7.49
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Ferric phosphate slug bait (~1% FePO4) at 1% bulk. Indexed as CAS 10045-86-0, formula FePO4. Buy it as 2.5 kg for around £14.99 from Amazon UK.
Working strength: 5 g/m² scatter. Indicative cost £0.03 per diluted litre — 36% below a typical branded pack on a per-litre basis, before you reuse leftover bulk.
Follow the mixing method and the supplier SDS. Wear the listed PPE. Do not mix incompatible oxidisers, acids or ammonia.
- 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.
Dilution recipe
1 L working batch
Working strength 5 g/m² scatter. Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
100 grams
Ferric phosphate slug bait (~1% FePO4)
Water
1 litres
Carrier / diluent
0% concentrate · 100% water by working volume (solids are dissolved into the water share).
Required PPE
Loading calculator…
Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedDoff | Raw active dupeDupeStack |
|---|---|---|
| Product | Slug & Snail Killer PelletsAmazon UK search — listing, not a confirmed seller | Ferric phosphate slug bait (~1% FePO4) |
| Pack / unit | 800 g tub · £7.49 | 2.5 kg · £14.99 |
| Active | Ferric phosphate at 1%Carrier: Wheat bait and binders | 1% bulkFePO4 |
| CAS number | Not disclosed on pack | 10045-86-0 |
| Working strength | Ready-to-use pack | Dilute 5 g/m² scatter |
| Cost per litre | £7.49 / pack | £0.03 / L mixed from bulk |
| Headline saving | Baseline | 36% cheaper |
| COSHH / PPE | Follow the branded SDS | Gloves. Chemical-resistant gloves (nitrile or neoprene) |
Active ingredient and cheaper alternative — FAQ
What is the active ingredient in Doff?
Doff Slug & Snail Killer Pellets is labelled as Ferric phosphate at 1%. The carrier is Wheat bait and binders. Pack size: 800 g tub. The bulk equivalent we index is Ferric phosphate slug bait (~1% FePO4) (CAS 10045-86-0).
Is Ferric phosphate slug bait (~1% FePO4) safe on lawns?
Used at the listed working strength (5 g/m² scatter), the dupe is the same chemistry as the branded pack for lawns, beds and pots. That is not a blanket all-clear: read the supplier SDS, wear the listed PPE, keep acids away from hypochlorite, and follow UK HSE/COSHH rules. Wellness teardowns are supplements, not medicines.
Is there a cheaper alternative to Doff Slug & Snail Killer Pellets?
Yes. The bulk equivalent is Ferric phosphate slug bait (~1% FePO4) (CAS 10045-86-0). Indicative saving 36% per working litre versus a pack that typically retails around £7.49. Working strength: 5 g/m² scatter. Live shop prices move.
How do you mix the Slug & Snail Killer Pellets dupe stack?
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.
DupeStack provides chemical concentration data and educational mixing guides only. Wellness pages compare food supplements, not medicines or prescribed treatments. Always review the supplier Safety Data Sheet (SDS) and comply with UK Health and Safety Executive (HSE) and COSHH regulations when handling concentrated substances. Mixing and storage are at your own risk. Some links are affiliate advertisements (Amazon Associates, eBay Partner Network, and Awin when those programmes are live). Commissions do not change listed concentrations or calculator output.
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£22.50Save 36% / L
Indicative DIY stack