HomeCompare fishDwarf rainbowfish vs Javanese ricefish Dwarf rainbowfish vs Javanese ricefish: can they live together? Verdict: CompatibleBoth are comfortable at 22–24°C (72–75°F).A pH of 7.5 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideDwarf rainbowfishJavanese ricefishAdult size5 cm (2 in)4.5 cm (1.8 in)Minimum tank150 L (40 US gal)75 L (20 US gal)Temperature22–28°C (72–82°F)20–24°C (68–75°F)pH6.5–7.57.5–8.5Hardness8–18 dGH (143–321 ppm)2–10 dGH (36–178 ppm)TemperamentPeacefulPeacefulCommunity tankGoodWith cautionCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxJavanese ricefishOryzias javanicus