HomeCompare fishRed rainbowfish vs Javanese ricefish Red rainbowfish vs Javanese ricefish: can they live together? Verdict: With cautionThe Red rainbowfish grows about twice as long as the Javanese ricefish; watch for bullying or predation.Both are comfortable at 22–24°C (72–75°F).A pH of 7.5–8.0 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideRed rainbowfishJavanese ricefishAdult size12 cm (4.7 in)4.5 cm (1.8 in)Minimum tank150 L (40 US gal)75 L (20 US gal)Temperature22–25°C (72–77°F)20–24°C (68–75°F)pH7.0–8.07.5–8.5Hardness9–19 dGH (161–339 ppm)2–10 dGH (36–178 ppm)TemperamentPeacefulPeacefulCommunity tankGoodWith cautionCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesRed rainbowfishGlossolepis incisusJavanese ricefishOryzias javanicus