HomeCompare fishForktail rainbowfish vs Yellowbelly gudgeon Forktail rainbowfish vs Yellowbelly gudgeon: can they live together? Verdict: With cautionThe Yellowbelly gudgeon is best kept in a species tank.Both are comfortable at 24–26°C (75–79°F).A pH of 6.0–7.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideForktail rainbowfishYellowbelly gudgeonAdult size5 cm (2 in)4.5 cm (1.8 in)Minimum tank75 L (20 US gal)55 L (15 US gal)Temperature24–26°C (75–79°F)21–26°C (70–79°F)pH6.0–8.05.5–7.0Hardness5–12 dGH (89–214 ppm)2–5 dGH (36–89 ppm)TemperamentPeacefulPeacefulCommunity tankGoodNot suitableCare levelEasyDifficultDietOmnivoreOmnivoreSpecies profilesForktail rainbowfishPseudomugil furcatusYellowbelly gudgeonAllomogurnda nesolepis