Ammonia detoxifiers are essential for emergency dosing. How they work: chemicals (sulfite, alpha-hydroxyaldehyde) bind ammonia into a non-toxic form (ammine complex) that's still detectable on test kits but no longer damages gills. The bacteria can still consume it, just slower. Top brands: Seachem Prime (gold-standard, also dechlorinates + handles nitrite), Continuum Aquatics Aqua Tonic Plus, ClorAm-X (industrial, used in fish farms). Dosing for emergencies: 5x normal dose (5 mL Prime per 50 gal) detoxifies up to 1 ppm ammonia for 24-48 hours. Important caveat: doesn't solve the cycle problem - just buys time. Test ammonia daily during emergencies, dose Prime daily until bacteria catches up + reads zero ammonia naturally. Test kit confusion: some test kits read total ammonia (free + bound) and show high readings even after Prime dose - that's expected. The fish are protected as long as Prime is dosed. Fish-in cycling: use 1-2x dose every 24h until cycled (3-6 weeks).
Reviewed by the Fast Aquatics husbandry team · Updated May 2026
Full glossary · Q&A library · Calculators · Disease database