Chinese Fighting Fish can survive in low oxygen water because they have gill organs (also called pleated gills). It should be kept in soft water that is weakly acidic to neutral, and at a temperature of 25-28 degrees Celsius. However, the Chinese fighting fish has a strong constitution and can tolerate temperatures as low as 3 degrees Celsius, and can be kept easily in winter without heating. Breeding is also easier. Breeding water temperature 28 degrees Celsius, weak acidic clean soft water, must have floating water plants.