HomeCompare fishLake Kutubu rainbowfish vs Murray river rainbowfish Lake Kutubu rainbowfish vs Murray river rainbowfish: can they live together? Verdict: CompatibleBoth are comfortable at 20–22°C (68–72°F).A pH of 7.0–7.2 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideLake Kutubu rainbowfishMurray river rainbowfishAdult size10 cm (3.9 in)9 cm (3.5 in)Minimum tank210 L (55 US gal)150 L (40 US gal)Temperature20–24°C (68–75°F)18–22°C (64–72°F)pH7.0–8.06.5–7.2Hardness9–12 dGH (161–214 ppm)–TemperamentPeacefulPeacefulCommunity tankGoodWith cautionCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesLake Kutubu rainbowfishMelanotaenia lacustrisMurray river rainbowfishMelanotaenia fluviatilis