HomeCompare fishDwarf rainbowfish vs Kamaka rainbowfish Dwarf rainbowfish vs Kamaka rainbowfish: can they live together? Verdict: With cautionThe Kamaka rainbowfish grows about twice as long as the Dwarf rainbowfish; watch for bullying or predation.Their temperature ranges only just meet, at 22°C (72°F).A pH of 6.5–7.2 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideDwarf rainbowfishKamaka rainbowfishAdult size5 cm (2 in)14 cm (5.5 in)Minimum tank150 L (40 US gal)210 L (55 US gal)Temperature22–28°C (72–82°F)18–22°C (64–72°F)pH6.5–7.56.5–7.2Hardness8–18 dGH (143–321 ppm)–TemperamentPeacefulPeacefulCommunity tankGoodWith cautionCare levelEasyDifficultDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxKamaka rainbowfishMelanotaenia kamaka