HomeCompare fishDwarf rainbowfish vs Peppered corydoras Dwarf rainbowfish vs Peppered corydoras: can they live together? Verdict: CompatibleBoth are comfortable at 25–28°C (77–82°F).A pH of 6.5–7.5 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideDwarf rainbowfishPeppered corydorasAdult size5 cm (2 in)8 cm (3.1 in)Minimum tank150 L (40 US gal)75 L (20 US gal)Temperature22–28°C (72–82°F)25–28°C (77–82°F)pH6.5–7.56.0–7.8Hardness8–18 dGH (143–321 ppm)5–19 dGH (89–339 ppm)TemperamentPeacefulPeacefulCommunity tankGoodExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxPeppered corydorasCorydoras paleatus