HomeCompare fishDwarf rainbowfish vs Striped barb Dwarf rainbowfish vs Striped barb: can they live together? Verdict: With cautionThe Striped barb grows about twice as long as the Dwarf rainbowfish; watch for bullying or predation.Both are comfortable at 23–26°C (73–79°F).A pH of 6.5 suits both.Minimum tank for the pair: 210 L (55 US gal)Side by sideDwarf rainbowfishStriped barbAdult size5 cm (2 in)12 cm (4.7 in)Minimum tank150 L (40 US gal)210 L (55 US gal)Temperature22–28°C (72–82°F)23–26°C (73–79°F)pH6.5–7.56.0–6.5Hardness8–18 dGH (143–321 ppm)2–12 dGH (36–214 ppm)TemperamentPeacefulPeacefulCommunity tankGoodExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxStriped barbPuntius johorensis