Compatibility index
Which aquarium treatments are safe for snails?
Nerite, mystery, ramshorn and other aquarium snails. Every treatment in the database, grouped by what its manufacturer actually states — not by what the ingredient list implies.
5 of 24 formulations are stated compatible with snails by the manufacturer.
The rest are qualified, contradicted, or simply never addressed — which is why counting green ticks is the wrong way to read this page.
The manufacturer states it is compatible (5)
A positive claim from the people who make the product. This is the only group where a manufacturer has actually said yes.
Fritz Aquatics ParaCleanse
Internal parasite treatment
Covered by the same invertebrate safety statement, which Fritz makes without carve-outs.
Seachem StressGuard
Slime coat protectant and stress reducer
Covered by the same invertebrate safety statement.
Fritz Aquatics Maracyn
Bacterial infection treatment
Named directly in Fritz’s compatibility table as compatible.
Fritz Aquatics Maracyn Two
Bacterial infection treatment
Named directly in Fritz's compatibility table as compatible.
Fritz Aquatics Maracyn Oxy
Non-antibiotic oxidising treatment
Named directly in the compatibility table as compatible.
Permitted, with conditions (3)
Not a refusal and not a clearance — a reduced dose, a species carve-out, or a manufacturer declining to certify.
Fritz Aquatics PraziCleanse
Anthelmintic (deworming) treatment
Covered by the same qualified statement — Fritz says most invertebrates, without naming snails. Read it as a hedge rather than a species-level clearance.
Fritz Aquatics Expel-P
Internal nematode treatment
Fritz clears invertebrates generally, then carves snails out: some species may be temporarily affected. That qualifier is the reason this is not recorded as compatible — a blanket invertebrate claim does not override the manufacturer’s own exception.
API PIMAFIX
Antifungal remedy
Covered by the same general invertebrate claim, with the same caveat: the examples given are corals and anemones, not aquarium snails.
Sources disagree (2)
Credible sources contradict each other, sometimes on the same page. Both are shown on the record so you can judge.
API Liquid Super Ick Cure
Ich treatment
API advises against use with invertebrates, while some retailer listings claim snails tolerate a half dose. The manufacturer outranks the retailer here, so treat this as do-not-use unless a vet says otherwise — but the disagreement is real and worth knowing about.
Seachem NeoPlex
Bacterial infection treatment
The same two contradictory statements cover snails. Until Seachem clarifies, treat the more restrictive instruction as the operative one.
No statement found (5)
We looked and the manufacturer does not address this group. Silence is not a clearance — treat these as unconfirmed.
API General Cure
Internal and external parasite treatment
API makes no statement about snails on this product page. Treat as unconfirmed rather than assuming the plant-safety claim extends to invertebrates.
Seachem Focus
Medication binder for medicated food
Seachem does not address snails specifically for this product.
API MELAFIX
Antibacterial remedy
API makes no statement about snails on this product page, despite the claim circulating widely on retailer and forum pages.
Fritz Aquatics Expel-F
Antifungal / nuisance algae treatment
Not named in Fritz’s compatibility statement for this product.
Fritz Aquatics MetroCleanse
Internal parasite treatment
No manufacturer statement about snails was found for this formulation.
The manufacturer advises against it (9)
Named in a warning. Move the livestock or choose another treatment.
Seachem ParaGuard
External parasite and fungal treatment
Snails are invertebrates and fall under the same opening instruction in the Directions to remove all invertebrates before dosing.
Fritz Aquatics Algae Clean Out
Algae treatment
Snails are named directly in the same warning. Remove them before dosing.
Fritz Aquatics Mardel Coppersafe
External parasite treatment (chelated copper)
Named directly in the same warning. Remove before dosing.
Seachem Cupramine
External parasite treatment (copper-amine)
Snails are invertebrates and fall under the same instruction to remove all invertebrates before treatment.
Seachem MetroPlex
Protozoan parasite and anaerobic bacterial treatment
Snails fall under the same instruction — Seachem tells keepers to remove all invertebrates before treatment and does not single snails out as an exception. Treat it as a blanket precaution across their medication range rather than a finding about this formulation.
Seachem PolyGuard
Broad-spectrum bacterial, fungal and parasitic treatment
Snails fall under the same instruction — Seachem tells keepers to remove all invertebrates before treatment and does not single snails out as an exception.
Seachem KanaPlex
Bacterial and fungal infection treatment
Snails are invertebrates and fall under the same instruction to remove all invertebrates.
Seachem SulfaPlex
Bacterial and fungal infection treatment
Covered by the same blanket instruction to remove all invertebrates.
Fritz Aquatics FixIck
External parasite treatment
Named directly in the compatibility table as not recommended.
Other livestock
No evidence found means no manufacturer statement was found, not that a product is safe. Dataset last checked August 16, 2026.
FishyMag reports what manufacturers say, quoted and linked. It does not diagnose illness or recommend a treatment, and it never infers that a product is safe from the absence of a warning — where no statement exists, it says so.
Formulations change. Always read the label on the bottle in your hand, and contact the manufacturer if your tank contains anything valuable or unusual.