The phoenix rasbora (Boraras merah) is a small fish native to southern Borneo where it inhabits black water streams and rivers associated with ancient forest peat swamps. Mature fish reach a size of less than one inch long. Females are generally more round bodied and slightly larger than the more colorful males.
The phoenix rasbora should be maintained in an aquarium of 10 gallons or larger. Smooth rocks, driftwood (ZM2000) and live or artificial plants may be used, as well as a sand substrate (CS7538). These fish look great in a heavily planted tank with a dark substrate and floating plants to diffuse some of the light..
The phoenix rasbora prefers a temperature of 68°F to 82°F, a pH of 4.0 to 6.5, and a hardness of 1 to 5°H. Be sure water is clean and well oxygenated, but doesn't have too much flow.
The phoenix rasbora is suitable for a very peaceful community aquarium. Good tank mates include other micro rasboras, pygmy cories, otocinclus catfish, and small gouramis such as chocolate and licorice gouramis. Phoenix rasboras should be kept in schools of at least 6 to 8 individuals to promote schooling behaviors and make these tiny fish less nervous.
The phoenix rasbora is easy to feed in the aquarium and will readily accept just about any appropriately sized food item such as flakes (AL165) and frozen brine shrimp (SF6777). For maximum color, growth, and health these fish will look their best when given probiotics (AL169) in addition to a balanced diet.