What tank size does Threadfin Rainbowfish need?

Threadfin Rainbowfish needs at least a 60L aquarium for healthy growth and behaviour.

What pH does Threadfin Rainbowfish need?

Keep pH between 6 and 7.5 for Threadfin Rainbowfish. Stable parameters matter more than chasing perfect numbers.

What temperature does Threadfin Rainbowfish need?

Threadfin Rainbowfish thrives at 24–29°C. Use a reliable heater and thermometer.

Is Threadfin Rainbowfish good for beginners?

Threadfin Rainbowfish is rated Beginner difficulty. Best for experienced keepers who can meet specialised needs.

Threadfin Rainbowfish (Iriatherina werneri) – Care, Prices & Availability

A minimum 60L aquarium suits Threadfin Rainbowfish. Match décor to natural behaviour — plants, rockwork, or open swimming room as needed.

Keep pH 6–7.5 and 24–29°C. Stable parameters matter more than chasing perfect numbers — acclimate new arrivals slowly.

Threadfin Rainbowfish is micropredator — very small foods. Feed a varied diet appropriate for freshwater fish — quality flakes, pellets, or frozen foods sized to the mouth.

Threadfin Rainbowfish is generally peaceful; males display with extended fins. Observe during feeding and at lights-out for true temperament.

Pair with similarly sized peaceful; males display with extended fins tankmates in freshwater fish. Avoid fin-nippers or species that outgrow this fish.

Breeding notes for Threadfin Rainbowfish vary by line and water chemistry — ask your local shop about proven pairs in SA.