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Melanotaenia fluviatilis
Care guide, husbandry, breeding, disease, and sourcing intelligence on Australian Rainbowfish - written by the Fast Aquatics editorial team.
Australian Rainbowfish requires a minimum of 30 gallons for healthy adults. The minimum is based on 4 inches adult size and territorial range. Plan a tank sized for adult footprint, HOB or canister filter rated 4-6x volume, dechlorinated water, appropriate temperature heater, and stocking-appropriate hardscape.
The Australian Rainbowfish needs a tank of at least 30 gallons. Adults reach about 4 inches and live 5-8 years. Best paired with peaceful tankmates of similar size and water-chemistry needs.
Australian Rainbowfish reaches 4 inches at adulthood with a captive lifespan of 5-8 years with proper care. The minimum is based on 4 inches adult size and territorial range. Plan a tank sized for adult footprint, HOB or canister filter rated 4-6x volume, dechlorinated water, appropriate temperature heater, and stocking-appropriate hardscape.
Australian Rainbowfish is susceptible to standard freshwater diseases (ich, columnaris, fin rot, bacterial infections). Quarantine new Australian Rainbowfish for 4 weeks before adding to display. Australian Rainbowfish prefers freshwater parameters: temperature 74-80°F, pH 6.5-7.5, GH 4-12 dGH, KH 3-8 dKH, ammonia + nitrite 0 ppm, nitrate under 20 ppm. Use dechlorinator on every water change.
Other species in the same category with care profiles on Fast Aquatics. Click any name for the full husbandry breakdown.
Australian Rainbowfish taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.
Browse the full disease database, calculator collection, aquarium glossary, or Q&A library for additional reference.