Parasite treatment Seachem Fish & Aquatic · Water Care

Seachem

Seachem ParaGuard Parasite Control, 100 ml

Parasite treatment

Best for: External parasites in fish

An aldehyde-based treatment for external parasites, fungal and bacterial problems. Gentler than many alternatives and doesn't harm biological filtration.

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Other sizes on Amazon: 250 ml

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What we like

  • Broad external use
  • Filter-friendly
  • Gentle on fish

Keep in mind

  • Not safe for invertebrates
  • Treat in a hospital tank if possible

Our in-depth look

Who it's for

Fish showing external parasites like ich.

Who should skip it

Tanks with shrimp, snails or other invertebrates — remove them or treat fish in a hospital tank.

Tips

Follow the label dosing exactly and add extra aeration during treatment. Ask an aquatic vet if signs don't improve.

Key features

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Questions owners ask

Is it safe for shrimp?

No — avoid using with invertebrates.

Does it harm the filter?

Seachem says it doesn't harm biological filtration.

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