HomeCompare fishHead-and-taillight tetra vs Butterfly splitfin Head-and-taillight tetra vs Butterfly splitfin: can they live together? Verdict: With cautionTheir temperature ranges only just meet, at 26°C (79°F).A pH of 6.0–8.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideHead-and-taillight tetraButterfly splitfinAdult size5 cm (2 in)8 cm (3.1 in)Minimum tank75 L (20 US gal)75 L (20 US gal)Temperature22–26°C (72–79°F)26–32°C (79–90°F)pH6.0–8.06.0–8.0Hardness5–19 dGH (89–339 ppm)9–19 dGH (161–339 ppm)TemperamentPeacefulPeacefulCommunity tankExcellentGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesHead-and-taillight tetraHemigrammus ocelliferButterfly splitfinAmeca splendens