HomeCompare fishChocolate gourami vs Siamese fighting fish Chocolate gourami vs Siamese fighting fish: can they live together? Verdict: With cautionThe Siamese fighting fish can be semi-aggressive or nip fins.The Chocolate gourami is best kept in a species tank.The Chocolate gourami can be semi-aggressive or nip fins.Both are comfortable at 26–30°C (79–86°F).A pH of 6.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideChocolate gouramiSiamese fighting fishAdult size7 cm (2.8 in)6.5 cm (2.6 in)Minimum tank75 L (20 US gal)20 L (5 US gal)Temperature26–31°C (79–88°F)24–30°C (75–86°F)pH4.0–6.06.0–8.0Hardness0–4 dGH (0–71 ppm)5–19 dGH (89–339 ppm)TemperamentSemi-aggressiveSemi-aggressiveCommunity tankNot suitableGoodCare levelDifficultEasyDietOmnivoreOmnivoreSpecies profilesChocolate gouramiSphaerichthys osphromenoidesSiamese fighting fishBetta splendens