HomeCompare fishGlowlight tetra vs Black ghost Glowlight tetra vs Black ghost: can they live together? Verdict: Not recommendedThe Black ghost is aggressive towards other fish.An adult Black ghost is about 10 times the length of a Glowlight tetra and may eat it.Both are comfortable at 24–28°C (75–82°F).A pH of 6.0–8.0 suits both.Side by sideGlowlight tetraBlack ghostAdult size5 cm (2 in)50 cm (20 in)Minimum tank40 L (11 US gal)210 L (55 US gal)Temperature24–28°C (75–82°F)23–28°C (73–82°F)pH6.0–8.06.0–8.0Hardness5–12 dGH (89–214 ppm)5–10 dGH (89–178 ppm)TemperamentPeacefulAggressiveCommunity tankExcellentGoodCare levelEasyModerateDietOmnivoreOmnivoreSpecies profilesGlowlight tetraHemigrammus erythrozonusBlack ghostApteronotus albifrons