HomeCompare fishLake Kutubu rainbowfish vs Redtail splitfin Lake Kutubu rainbowfish vs Redtail splitfin: can they live together? Verdict: With cautionThe Redtail splitfin can be semi-aggressive or nip fins.Both are comfortable at 20–24°C (68–75°F).A pH of 7.0–8.0 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideLake Kutubu rainbowfishRedtail splitfinAdult size10 cm (3.9 in)6 cm (2.4 in)Minimum tank210 L (55 US gal)75 L (20 US gal)Temperature20–24°C (68–75°F)15–32°C (59–90°F)pH7.0–8.06.0–8.0Hardness9–12 dGH (161–214 ppm)9–19 dGH (161–339 ppm)TemperamentPeacefulSemi-aggressiveCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesLake Kutubu rainbowfishMelanotaenia lacustrisRedtail splitfinXenotoca eiseni