HomeCompare fishLake Kutubu rainbowfish vs Dwarf rainbowfish Lake Kutubu rainbowfish vs Dwarf rainbowfish: can they live together? Verdict: With cautionThe Lake Kutubu rainbowfish grows about twice as long as the Dwarf rainbowfish; watch for bullying or predation.Both are comfortable at 22–24°C (72–75°F).A pH of 7.0–7.5 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideLake Kutubu rainbowfishDwarf rainbowfishAdult size10 cm (3.9 in)5 cm (2 in)Minimum tank210 L (55 US gal)150 L (40 US gal)Temperature20–24°C (68–75°F)22–28°C (72–82°F)pH7.0–8.06.5–7.5Hardness9–12 dGH (161–214 ppm)8–18 dGH (143–321 ppm)TemperamentPeacefulPeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesLake Kutubu rainbowfishMelanotaenia lacustrisDwarf rainbowfishMelanotaenia praecox