HomeCompare fishDwarf rainbowfish vs Clown barb Dwarf rainbowfish vs Clown barb: can they live together? Verdict: With cautionThe Clown barb grows about twice as long as the Dwarf rainbowfish; watch for bullying or predation.Both are comfortable at 24–28°C (75–82°F).A pH of 6.5–7.0 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideDwarf rainbowfishClown barbAdult size5 cm (2 in)14 cm (5.5 in)Minimum tank150 L (40 US gal)75 L (20 US gal)Temperature22–28°C (72–82°F)24–28°C (75–82°F)pH6.5–7.56.0–7.0Hardness8–18 dGH (143–321 ppm)7–17 dGH (125–303 ppm)TemperamentPeacefulPeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxClown barbPuntius everetti