HomeCompare fishClown rasbora vs Slim betta Clown rasbora vs Slim betta: can they live together? Verdict: With cautionThe Slim betta can be semi-aggressive or nip fins.Both are comfortable at 24–29°C (75–84°F).A pH of 6.5–7.0 suits both.Minimum tank for the pair: 110 L (29 US gal)Side by sideClown rasboraSlim bettaAdult size9 cm (3.5 in)10 cm (3.9 in)Minimum tank110 L (29 US gal)75 L (20 US gal)Temperature24–29°C (75–84°F)24–30°C (75–86°F)pH5.5–7.06.5–7.5Hardness2–10 dGH (36–178 ppm)5–15 dGH (89–268 ppm)TemperamentPeacefulSemi-aggressiveCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesClown rasboraRasbora kalochromaSlim bettaBetta bellica