HomeCompare fishBlack neon tetra vs Black phantom tetra Black neon tetra vs Black phantom tetra: can they live together? Verdict: CompatibleBoth are comfortable at 23–28°C (73–82°F).A pH of 6.0–7.5 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideBlack neon tetraBlack phantom tetraAdult size3.2 cm (1.3 in)4 cm (1.6 in)Minimum tank75 L (20 US gal)75 L (20 US gal)Temperature23–28°C (73–82°F)22–28°C (72–82°F)pH5.5–7.56.0–7.5Hardness2–15 dGH (36–268 ppm)2–18 dGH (36–321 ppm)TemperamentPeacefulPeacefulCommunity tankExcellentExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesBlack neon tetraHyphessobrycon herbertaxelrodiBlack phantom tetraHyphessobrycon megalopterus