Best rainbowfish for freshwater tanks

5 species in this category on Fishori. Open a profile for tank size, temperament, then run pair checks before mixing.

Rainbowfish are peaceful shoalers that look unremarkable in a shop tank and spectacular in a mature one at home. The colour develops over 12 to 18 months of stable water, good light, and a settled school. They want slightly hard, slightly alkaline water, and they display best with three or four males to one female so the males show off at each other rather than chase the females around the tank.