HomeCompare fishRed rainbowfish vs Glass catfish Red rainbowfish vs Glass catfish: can they live together? Verdict: CompatibleBoth are comfortable at 22–25°C (72–77°F).A pH of 7.0 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideRed rainbowfishGlass catfishAdult size12 cm (4.7 in)15 cm (5.9 in)Minimum tank150 L (40 US gal)150 L (40 US gal)Temperature22–25°C (72–77°F)21–26°C (70–79°F)pH7.0–8.06.5–7.0Hardness9–19 dGH (161–339 ppm)8–18 dGH (143–321 ppm)TemperamentPeacefulPeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreCarnivoreSpecies profilesRed rainbowfishGlossolepis incisusGlass catfishKryptopterus bicirrhis