HomeCompare fishSlim betta vs Crescent betta Slim betta vs Crescent betta: can they live together? Verdict: With cautionThe Slim betta can be semi-aggressive or nip fins.Both are comfortable at 24–30°C (75–86°F).A pH of 6.5–7.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideSlim bettaCrescent bettaAdult size10 cm (3.9 in)6 cm (2.4 in)Minimum tank75 L (20 US gal)40 L (11 US gal)Temperature24–30°C (75–86°F)24–30°C (75–86°F)pH6.5–7.56.0–7.0Hardness5–15 dGH (89–268 ppm)5–19 dGH (89–339 ppm)TemperamentSemi-aggressivePeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesSlim bettaBetta bellicaCrescent bettaBetta imbellis