HomeCompare fishBrilliant rasbora vs Crescent betta Brilliant rasbora vs Crescent betta: can they live together? Verdict: CompatibleBoth are comfortable at 24–26°C (75–79°F).A pH of 6.0–6.5 suits both.Minimum tank for the pair: 110 L (29 US gal)Side by sideBrilliant rasboraCrescent bettaAdult size9 cm (3.5 in)6 cm (2.4 in)Minimum tank110 L (29 US gal)40 L (11 US gal)Temperature22–26°C (72–79°F)24–30°C (75–86°F)pH6.0–6.56.0–7.0Hardness–5–19 dGH (89–339 ppm)TemperamentPeacefulPeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesBrilliant rasboraRasbora einthoveniiCrescent bettaBetta imbellis