HomeCompare fishGlowlight tetra vs Black neon tetra Glowlight tetra vs Black neon tetra: can they live together? Verdict: CompatibleBoth are comfortable at 24–28°C (75–82°F).A pH of 6.0–7.5 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideGlowlight tetraBlack neon tetraAdult size5 cm (2 in)3.2 cm (1.3 in)Minimum tank40 L (11 US gal)75 L (20 US gal)Temperature24–28°C (75–82°F)23–28°C (73–82°F)pH6.0–8.05.5–7.5Hardness5–12 dGH (89–214 ppm)2–15 dGH (36–268 ppm)TemperamentPeacefulPeacefulCommunity tankExcellentExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesGlowlight tetraHemigrammus erythrozonusBlack neon tetraHyphessobrycon herbertaxelrodi