HomeCompare fishLake Kutubu rainbowfish vs Head-and-taillight tetra Lake Kutubu rainbowfish vs Head-and-taillight tetra: can they live together? Verdict: With cautionThe Lake Kutubu rainbowfish grows about twice as long as the Head-and-taillight tetra; watch for bullying or predation.Both are comfortable at 22–24°C (72–75°F).A pH of 7.0–8.0 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideLake Kutubu rainbowfishHead-and-taillight tetraAdult size10 cm (3.9 in)5 cm (2 in)Minimum tank210 L (55 US gal)75 L (20 US gal)Temperature20–24°C (68–75°F)22–26°C (72–79°F)pH7.0–8.06.0–8.0Hardness9–12 dGH (161–214 ppm)5–19 dGH (89–339 ppm)TemperamentPeacefulPeacefulCommunity tankGoodExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesLake Kutubu rainbowfishMelanotaenia lacustrisHead-and-taillight tetraHemigrammus ocellifer