The bottle matters
Market and formulation stay explicit because familiar product names can change over time.
Manufacturer wording, linked
Treat the problem.
Protect the tank.
Check a specific aquarium-treatment formulation against the shrimp, snails, plants and other life already in your tank. Every factual verdict shows its source; undocumented cases stay visibly unknown.
- 24
- formulations
- 106
- verdicts
- 3
- manufacturers
Positive claims require evidence.No statement means unknown—not safe.
Interactive evidence check
What lives in your tank?
Choose a formulation and the livestock you need to protect. The most restrictive manufacturer position leads.
External parasite and fungal treatment · US formulation
The manufacturer advises against using this with your tank.
At least one thing you listed is named in a warning. Move that livestock to another tank, or choose a different treatment.
This answers for the assumed selection above, not a tank you have described. Adjust it if it is not yours.
- ShrimpManufacturer advises against
Seachem's Directions open by instructing keepers to remove all invertebrates before dosing. Their FAQ is softer — they decline to certify the product as invert safe rather than forbidding it — but an instruction in the Directions outranks a hedge in the FAQ, so this is recorded as advise-against.
- SnailsManufacturer advises against
Snails are invertebrates and fall under the same opening instruction in the Directions to remove all invertebrates before dosing.
- Live plantsCaution
Seachem describes it as generally safe in planted aquaria, but frames this as their experience rather than a tested guarantee. That is weaker than a label claim, so it is recorded as caution rather than compatible.
See the manufacturer’s exact wording and sources for Seachem ParaGuard →
No evidence found means no manufacturer statement was found — not that the product is safe. FishyMag does not diagnose disease or recommend treatments.
Observation desk · illustrativeHow the ledger works
Evidence before confidence.
Unknown stays unknown
A missing warning never becomes a green light. Silence remains visibly unconfirmed.
Read the words yourself
Every verdict exposes its source type, checked date and original wording where available.
Why “it contains no copper” isn’t an answer
One product proves why this dataset cannot be generated from ingredient lists.
Ingredient context · illustrativeCopper is the best-known invertebrate killer in the hobby, so the obvious shortcut is to check the ingredients and clear anything copper-free. That shortcut is wrong.
Fritz Algae Clean Out contains no copper. Fritz still says: “Not safe for use with freshwater invertebrates including snails, shrimp, clams, other crustaceans or molluscs.” An ingredient-based checker would have given that product a green tick and cost you your shrimp colony.
So FishyMag treats ingredients as a way to raise a warning, never to issue a clearance. A positive verdict requires the manufacturer to have said so.
Tools
Work out what your tank really holds, then check what is safe to put in it.
Aquarium CalculatorWork out true water volume, water-change amounts, and unit conversions — with every step shown.Tank ProfileSave what lives in your tank once, then check any treatment against all of it at once.Treatment ComparisonPut two or more treatments side by side: documented verdicts, ingredients, evidence quality and gaps.Label Dose CalculatorScale a manufacturer’s own dose ratio to your real water volume, with the label wording beside the answer.
Treatments
24 formulations from 3 manufacturers, 76 of 106 verdicts backed by a first-party source.
Seachem ParaGuard
External parasite and fungal treatment
- Shrimp
- Do not use
- Snails
- Do not use
Fritz Aquatics Algae Clean Out
Algae treatment
- Shrimp
- Do not use
- Snails
- Do not use
Fritz Aquatics Mardel Coppersafe
External parasite treatment (chelated copper)
- Shrimp
- Do not use
- Snails
- Do not use
Seachem Cupramine
External parasite treatment (copper-amine)
- Shrimp
- Do not use
- Snails
- Do not use
API Liquid Super Ick Cure
Ich treatment
- Shrimp
- Do not use
- Snails
- Conflicting
Seachem MetroPlex
Protozoan parasite and anaerobic bacterial treatment
- Shrimp
- Do not use
- Snails
- Do not use
Seachem PolyGuard
Broad-spectrum bacterial, fungal and parasitic treatment
- Shrimp
- Do not use
- Snails
- Do not use
Fritz Aquatics PraziCleanse
Anthelmintic (deworming) treatment
- Shrimp
- Caution
- Snails
- Caution
API General Cure
Internal and external parasite treatment
- Shrimp
- Unknown
- Snails
- Unknown
Fritz Aquatics ParaCleanse
Internal parasite treatment
- Shrimp
- Compatible
- Snails
- Compatible
Seachem KanaPlex
Bacterial and fungal infection treatment
- Shrimp
- Do not use
- Snails
- Do not use
Seachem NeoPlex
Bacterial infection treatment
- Shrimp
- Conflicting
- Snails
- Conflicting
Seachem Focus
Medication binder for medicated food
- Shrimp
- Caution
- Snails
- Unknown
Seachem StressGuard
Slime coat protectant and stress reducer
- Shrimp
- Compatible
- Snails
- Compatible
API MELAFIX
Antibacterial remedy
- Shrimp
- Unknown
- Snails
- Unknown
Fritz Aquatics Expel-P
Internal nematode treatment
- Shrimp
- Compatible
- Snails
- Caution
Fritz Aquatics Maracyn
Bacterial infection treatment
- Shrimp
- Compatible
- Snails
- Compatible
Seachem SulfaPlex
Bacterial and fungal infection treatment
- Shrimp
- Do not use
- Snails
- Do not use
API PIMAFIX
Antifungal remedy
- Shrimp
- Caution
- Snails
- Caution
Fritz Aquatics Maracyn Two
Bacterial infection treatment
- Shrimp
- Compatible
- Snails
- Compatible
Fritz Aquatics Maracyn Oxy
Non-antibiotic oxidising treatment
- Shrimp
- Compatible
- Snails
- Compatible
Fritz Aquatics FixIck
External parasite treatment
- Shrimp
- Do not use
- Snails
- Do not use
Fritz Aquatics Expel-F
Antifungal / nuisance algae treatment
- Shrimp
- Unknown
- Snails
- Unknown
Fritz Aquatics MetroCleanse
Internal parasite treatment
- Shrimp
- Unknown
- Snails
- Unknown
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.
Dataset last checked August 16, 2026.