HomeCompare fishBlack phantom tetra vs Red phantom tetra Black phantom tetra vs Red phantom tetra: can they live together? Verdict: CompatibleBoth are comfortable at 22–25°C (72–77°F).A pH of 6.0–7.5 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideBlack phantom tetraRed phantom tetraAdult size4 cm (1.6 in)4 cm (1.6 in)Minimum tank75 L (20 US gal)55 L (15 US gal)Temperature22–28°C (72–82°F)22–25°C (72–77°F)pH6.0–7.55.5–7.5Hardness2–18 dGH (36–321 ppm)4–20 dGH (71–357 ppm)TemperamentPeacefulPeacefulCommunity tankExcellentExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesBlack phantom tetraHyphessobrycon megalopterusRed phantom tetraHyphessobrycon sweglesi