FishyMagEvidence-led tank care

Formulation evidence record

Seachem SulfaPlex

Bacterial and fungal infection treatment · US formulation

Shrimp

Amano, cherry, crystal and other freshwater shrimp.

Do not use

Snails

Nerite, mystery, ramshorn and other aquarium snails.

Do not use

Live plants

Rooted and floating live aquarium plants.

Unknown

Not addressed by the manufacturer for: scaleless fish, marine invertebrates, biological filter. No statement was found, so no verdict is given — that is not a clearance.

Why FishyMag says this

The manufacturer's own wording, quoted rather than paraphrased, so you can judge it yourself.

Shrimp

Manufacturer advises against

The directions instruct removing all invertebrates. Note this is the same sentence Seachem prints across its medication line rather than a finding specific to sulfathiazole — the instruction still stands, but it is blanket guidance, not a test result for this chemistry.

Contains sulfathiazole, with a source-linked caution associated with this group. This raises a flag—it is not the basis of the verdict above.

“Remove all invertebrates - these are extremely sensitive to medication.”

manufacturer page · seachem.com · checked August 16, 2026

Snails

Manufacturer advises against

Covered by the same blanket instruction to remove all invertebrates.

Contains sulfathiazole, with a source-linked caution associated with this group. This raises a flag—it is not the basis of the verdict above.

“Remove all invertebrates - these are extremely sensitive to medication.”

manufacturer page · seachem.com · checked August 16, 2026

Live plants

No evidence found

Seachem does not address live plants for this product.

No manufacturer statement was found for this group. That is not the same as a clearance — treat it as unconfirmed and ask the manufacturer before dosing.

Check the evidence boundary

What this record can—and cannot—answer

Bottle identity

US formulation · label revision: not recorded · version: not recorded.

Match the label and concentration on your bottle before using a dose ratio.

Unresolved groups

Live plants, Scaleless fish, Marine invertebrates, Biological filter

Missing evidence is not a compatibility finding.

Product combinations

No specific interaction warning is recorded here. This is not a complete interaction review or permission to combine treatments.

Evidence age

Formulation record checked August 16, 2026. Source dates can differ within the record. A dated check is not a guarantee that the label has stayed unchanged.

Prepare a manufacturer question →

Product details

Manufacturer states it treats
Bacterial infections, Fungal infections, External and internal infections
Chemical filtration
Remove chemical filtration during treatment
Ingredients as stated
Sulfathiazole (69%).
Active ingredients
Sulfathiazole

manufacturer page · seachem.com · checked August 16, 2026

Record last checked August 16, 2026 · confidence medium

Check against your tank

Change what is in your tank to see how the answer moves.

The biological filter is included in every non-empty tank check, alongside your selected groups.

Bacterial and fungal infection treatment · US formulation

2 Select everything in the tank

Assuming a common community tank. Change the selection, or save your tank so every page answers for it.

The manufacturer advises against using this with your tank.

At least one selected group is named in a warning. Read the exact instruction and ask the manufacturer to clarify your setup before dosing.

This answers for the assumed selection above, not a tank you have described. Adjust it if it is not yours.

  • ShrimpManufacturer advises against

    The directions instruct removing all invertebrates. Note this is the same sentence Seachem prints across its medication line rather than a finding specific to sulfathiazole — the instruction still stands, but it is blanket guidance, not a test result for this chemistry.

  • SnailsManufacturer advises against

    Covered by the same blanket instruction to remove all invertebrates.

  • Live plantsNo evidence found

    Seachem does not address live plants for this product.

  • Biological filterNo evidence found

    No statement from the manufacturer was found for this group. Treat it as unconfirmed and check with the manufacturer before dosing.

See the manufacturer’s exact wording and sources for Seachem SulfaPlex →

No evidence found means no manufacturer statement was found — not that the product is safe. FishyMag does not diagnose disease or recommend treatments.

Other treatments

Seachem ParaGuardFritz Aquatics Algae Clean OutFritz Aquatics Mardel CoppersafeSeachem CupramineAPI Liquid Super Ick CureSeachem MetroPlexSeachem PolyGuardFritz Aquatics PraziCleanseAPI General CureFritz Aquatics ParaCleanseSeachem KanaPlexSeachem NeoPlexSeachem FocusSeachem StressGuardAPI MELAFIXFritz Aquatics Expel-PFritz Aquatics MaracynAPI PIMAFIXFritz Aquatics Maracyn TwoFritz Aquatics Maracyn OxyFritz Aquatics FixIckFritz Aquatics Expel-FFritz Aquatics MetroCleanse

Next steps

Does this record match your bottle?Compare the name, market and label details. Download unresolved identity questions.Resolve an unanswered question about Seachem SulfaPlexDownload the evidence and a manufacturer enquiry with your bottle details and livestock groups.Keep a treatment recordRecord what was actually used and when. Save on this device or export for a support conversation.How much Seachem SulfaPlex for my tank?Scales the label ratio to your real water volume, with the manufacturer wording beside the answer.Check against my tankSee how Seachem SulfaPlex and every other treatment compare against what you actually keep.Compare with another treatmentPut Seachem SulfaPlex beside up to three alternatives, group by group.Work out your real water volumeDose against the water your tank holds, not the number on the box.

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.