Phoenix Rasbora (Boraras merah)
This tiny cyprinid comes from blackwater rainforest streams in Borneo. Adult males are more strongly coloured than the females, but both sport attractive red and black markings on their otherwise transparent bodies.
While Boraras merah isn’t particularly demanding in terms of behaviour or diet, its body size and water chemistry requirements do place certain restrictions on its suitability for all aquaria.
Water chemistry needs to be soft and acidic, 1-10 degrees dH, pH 6-7 being about right for a general community tank situation, and even more acidic conditions (pH 5-6) being necessary for successful breeding.
At most Boraras merah gets to about 1.5 cm in length and should be kept in a well-maintained, quiet environment with plenty of hiding places.
| Specifications |
|---|
| Species: Boraras merah |
| Size: Up to 1.5 cm |
| Water pH: 6-7 (5-6 for breeding) |
| Water dH: 1-10 |
| Temperature: 22-26°C |
| Compatibility: Peaceful, with similar-sized fish |
FAQ
What is the ideal water pH for keeping Phoenix Rasbora?
The ideal water pH for Phoenix Rasbora is between 6 and 7. For breeding, a pH of 5 to 6 is recommended.
How big do Phoenix Rasbora grow?
Phoenix Rasbora grow to a maximum length of about 1.5 cm.
Are Phoenix Rasbora suitable for community tanks?
They are suitable for community tanks as long as water conditions are soft and acidic, and tank mates are peaceful and similarly sized.
Anthony Lawrence –
I’ve kept Phoenix Rasbora for six months in a 10-gallon tank with soft, acidic water. The fish are active and show vibrant red and black markings. They don’t stress other fish and are easy to care for once the water parameters are set correctly.
Faith Glover –
The coloration is striking, especially in males. I maintained a pH of 6.5 and dH of 8, which worked well. They need a quiet environment and a few hiding spots, but they adapt quickly.
Michelle Payne –
Great addition to a small, planted tank. The fish are peaceful and stay active without causing any issues. I found that breeding requires slightly lower pH, but it’s possible with proper setup.