HomeCompare fishRed rainbowfish vs Murray river rainbowfish Red rainbowfish vs Murray river rainbowfish: can they live together? Verdict: With cautionTheir temperature ranges only just meet, at 22°C (72°F).A pH of 7.0–7.2 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideRed rainbowfishMurray river rainbowfishAdult size12 cm (4.7 in)9 cm (3.5 in)Minimum tank150 L (40 US gal)150 L (40 US gal)Temperature22–25°C (72–77°F)18–22°C (64–72°F)pH7.0–8.06.5–7.2Hardness9–19 dGH (161–339 ppm)–TemperamentPeacefulPeacefulCommunity tankGoodWith cautionCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesRed rainbowfishGlossolepis incisusMurray river rainbowfishMelanotaenia fluviatilis