HomeCompare fishPygmy gourami vs Siamese fighting fish Pygmy gourami vs Siamese fighting fish: can they live together? Verdict: With cautionThe Siamese fighting fish can be semi-aggressive or nip fins.The Pygmy gourami is best kept in a species tank.Both are comfortable at 25–28°C (77–82°F).A pH of 6.0–7.0 suits both.Minimum tank for the pair: 40 L (11 US gal)Side by sidePygmy gouramiSiamese fighting fishAdult size4 cm (1.6 in)6.5 cm (2.6 in)Minimum tank40 L (11 US gal)20 L (5 US gal)Temperature25–28°C (77–82°F)24–30°C (75–86°F)pH6.0–7.06.0–8.0Hardness5–19 dGH (89–339 ppm)5–19 dGH (89–339 ppm)TemperamentPeacefulSemi-aggressiveCommunity tankNot suitableGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesPygmy gouramiTrichopsis pumilaSiamese fighting fishBetta splendens