HomeCompare fishRed rainbowfish vs Butterfly splitfin Red rainbowfish vs Butterfly splitfin: can they live together? Verdict: Not recommendedTheir temperature ranges don't overlap.A pH of 7.0–8.0 suits both.Side by sideRed rainbowfishButterfly splitfinAdult size12 cm (4.7 in)8 cm (3.1 in)Minimum tank150 L (40 US gal)75 L (20 US gal)Temperature22–25°C (72–77°F)26–32°C (79–90°F)pH7.0–8.06.0–8.0Hardness9–19 dGH (161–339 ppm)9–19 dGH (161–339 ppm)TemperamentPeacefulPeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesRed rainbowfishGlossolepis incisusButterfly splitfinAmeca splendens