HomeCompare fishRedtail splitfin vs Crescent betta Redtail splitfin vs Crescent betta: can they live together? Verdict: With cautionThe Redtail splitfin can be semi-aggressive or nip fins.Both are comfortable at 24–30°C (75–86°F).A pH of 6.0–7.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideRedtail splitfinCrescent bettaAdult size6 cm (2.4 in)6 cm (2.4 in)Minimum tank75 L (20 US gal)40 L (11 US gal)Temperature15–32°C (59–90°F)24–30°C (75–86°F)pH6.0–8.06.0–7.0Hardness9–19 dGH (161–339 ppm)5–19 dGH (89–339 ppm)TemperamentSemi-aggressivePeacefulCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesRedtail splitfinXenotoca eiseniCrescent bettaBetta imbellis