HomeCompare fishGlowlight tetra vs Clown barb Glowlight tetra vs Clown barb: can they live together? Verdict: With cautionThe Clown barb grows about twice as long as the Glowlight tetra; watch for bullying or predation.Both are comfortable at 24–28°C (75–82°F).A pH of 6.0–7.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideGlowlight tetraClown barbAdult size5 cm (2 in)14 cm (5.5 in)Minimum tank40 L (11 US gal)75 L (20 US gal)Temperature24–28°C (75–82°F)24–28°C (75–82°F)pH6.0–8.06.0–7.0Hardness5–12 dGH (89–214 ppm)7–17 dGH (125–303 ppm)TemperamentPeacefulPeacefulCommunity tankExcellentGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesGlowlight tetraHemigrammus erythrozonusClown barbPuntius everetti