A 2 cm ember of orange-red marked with a few dark spots along the flank, glowing brightest against black substrate. One of the true nano fish, and one of the smallest sold anywhere.
Temperament
Common health issues
- Ich (white spot)
- Fin rot
- Skin conditions
- Swim bladder disorder
Care at a glance
- ExerciseModerate
An active swimmer that appreciates open swimming space.
- GroomingRoutine tank care
Weekly partial water changes keep them in top shape.
- Living spaceNano-tank friendly
Happy in a small, stable, well-filtered tank.
- Owner experienceSome experience helps
A little know-how makes life smoother.
- Commitment3โ5 years
Plan for a long, loving relationship.
Health to watch: Ich (white spot) ยท Fin rot ยท Skin conditions
๐ Care guide
The Phoenix Rasbora (Boraras merah) comes from the blackwater swamps of southern Borneo and reaches only about 1.5 to 2 cm, making it one of the smallest fish in the aquarium trade. Males are a deeper orange-red with a distinct dark blotch on the side; females are rounder and paler. Its wild habitat is extremely soft, acidic, tannin-heavy water over a bed of decomposing leaves. A group of ten or more works in a planted nano tank from 30 litres, at 24-28C with a pH of 4.5 to 7.0 and soft water, gentle filtration and plenty of fine-leaved plants and leaf litter. Food size is the practical challenge: its mouth is tiny, so it needs crushed micro-pellets, powdered fry food, live baby brine, microworms and small cyclops rather than standard flake. It is peaceful but easily outcompeted, so it must not share a tank with anything much larger, and it is a poor choice for a busy community. In a dedicated nano with shrimp it is exceptional.
Frequently asked questions
How active is a Phoenix Rasbora?
Moderate. An active swimmer that appreciates open swimming space.
How much maintenance does a Phoenix Rasbora need?
Routine tank care. Weekly partial water changes keep them in top shape.
What tank size does a Phoenix Rasbora need?
Nano-tank friendly. Happy in a small, stable, well-filtered tank.
Is a Phoenix Rasbora a good fit for first-time owners?
Some experience helps. A little know-how makes life smoother.
How long do Phoenix Rasbora live?
3โ5 years. Plan for a long, loving relationship.
What health issues affect the Phoenix Rasbora?
Keep an eye out for Ich (white spot), Fin rot, Skin conditions. These are worth raising with your vet, along with any screening they recommend.
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