HomeCompare fishSlim betta vs Moonlight gourami Slim betta vs Moonlight gourami: can they live together? Verdict: Not recommendedThe Moonlight gourami is aggressive towards other fish.The Slim betta can be semi-aggressive or nip fins.Both are comfortable at 25–30°C (77–86°F).A pH of 6.5–7.5 suits both.Side by sideSlim bettaMoonlight gouramiAdult size10 cm (3.9 in)13 cm (5.1 in)Minimum tank75 L (20 US gal)110 L (29 US gal)Temperature24–30°C (75–86°F)25–30°C (77–86°F)pH6.5–7.56.0–8.0Hardness5–15 dGH (89–268 ppm)2–25 dGH (36–446 ppm)TemperamentSemi-aggressiveAggressiveCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesSlim bettaBetta bellicaMoonlight gouramiTrichogaster microlepis