HomeCompare fishHead-and-taillight tetra vs Lemon tetra Head-and-taillight tetra vs Lemon tetra: can they live together? Verdict: CompatibleBoth are comfortable at 22–26°C (72–79°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 tetraLemon tetraAdult size5 cm (2 in)5 cm (2 in)Minimum tank75 L (20 US gal)75 L (20 US gal)Temperature22–26°C (72–79°F)22–28°C (72–82°F)pH6.0–8.05.5–8.0Hardness5–19 dGH (89–339 ppm)3–25 dGH (54–446 ppm)TemperamentPeacefulPeacefulCommunity tankExcellent–Care levelEasyEasyDietOmnivoreOmnivoreSpecies profilesHead-and-taillight tetraHemigrammus ocelliferLemon tetraHyphessobrycon pulchripinnis