HomeCompare fishFlag tetra vs Lemon tetra Flag tetra vs Lemon tetra: can they live together? Verdict: CompatibleBoth are comfortable at 22–28°C (72–82°F).A pH of 5.5–7.5 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideFlag tetraLemon tetraAdult size3.4 cm (1.3 in)5 cm (2 in)Minimum tank55 L (15 US gal)75 L (20 US gal)Temperature22–28°C (72–82°F)22–28°C (72–82°F)pH5.5–7.55.5–8.0Hardness5–15 dGH (89–268 ppm)3–25 dGH (54–446 ppm)TemperamentPeacefulPeacefulCommunity tankGood–Care levelModerateEasyDietOmnivoreOmnivoreSpecies profilesFlag tetraHyphessobrycon heterorhabdusLemon tetraHyphessobrycon pulchripinnis