HomeCompare fishLake Kutubu rainbowfish vs Garnet tetra Lake Kutubu rainbowfish vs Garnet tetra: can they live together? Verdict: With cautionThe Lake Kutubu rainbowfish grows about twice as long as the Garnet tetra; watch for bullying or predation.Their preferred pH ranges don't overlap.Both are comfortable at 23–24°C (73–75°F).Minimum tank for the pair: 210 L (55 US gal)Side by sideLake Kutubu rainbowfishGarnet tetraAdult size10 cm (3.9 in)5 cm (2 in)Minimum tank210 L (55 US gal)55 L (15 US gal)Temperature20–24°C (68–75°F)23–27°C (73–81°F)pH7.0–8.05.0–6.0Hardness9–12 dGH (161–214 ppm)5–12 dGH (89–214 ppm)TemperamentPeacefulPeacefulCommunity tankGoodExcellentCare levelEasy–DietOmnivoreOmnivoreSpecies profilesLake Kutubu rainbowfishMelanotaenia lacustrisGarnet tetraHemigrammus pulcher