Water parameters
Overview
The ornate rainbowfish is the only species in its genus and lives in the tea-colored, very soft and acidic streams of the sandy coastal heathland (wallum) on the east coast of Australia. Its body is slim and elongated; males show an iridescent blue lateral stripe and fins that lean toward red, blue or orange. Isolated populations differ markedly in color and are usually kept in the hobby under their locality names. It grows to 5–6 cm; because it is sensitive to water parameters, it requires experience.
Tank Setup
- At least 60 liters for a group of 6–10.
- 22–25°C, very soft and acidic water (pH 5.5–6.5 ideal); using reverse osmosis water and dried leaves/roots is beneficial.
- A dim layout with dense plants, roots and floating plants.
- It jumps; use a lid.
- Hybridization: Different locality forms interbreed and the form's distinctive colors are lost; keep each form separate.
Diet
Omnivorous but prefers small live and frozen foods: brine shrimp, cyclops, daphnia and mosquito larvae. It can be supplemented with fine flakes and micro granules.
Behavior and Compatibility
Peaceful and somewhat shy; males display to each other with spread fins. It gets along with shrimp and may only eat the young.
Good companions: Small tetras and rasboras that like soft water, blue-eye species, otocinclus, Caridina shrimp.
Avoid: Large and fast fish, fin nippers, species that need hard water.
A short profile for this species
The Ornate Rainbowfish page has the basics, but the sections below have not been written yet. If you keep this species, write a section from your own experience; it will be published under your name after editor approval.
Tank mates
This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.
Usually compatible
Flame Tetra
Blackfin Corydoras
Polystictus Corydoras
Emerald Cory
Porthole Catfish
Keyhole Cichlid
Geophagus surinamensis
Cryptocoryne Parva
Gold Spot Pleco (L001)
Adolfo's Cory
Should not be kept together
Hobbyist notes
Things you won't find in books, learned by trial and error. The most helpful ones are on top.
Change history and contributors
- Page created · October 16, 2026






