The optimal temperature range for betta fish is between 22°C and 30°C. Within this temperature range, betta fish can maintain their best health and activity levels. Specifically, betta fish are tropical fish, and the most suitable living temperature for them is between 26°C and 30°C. If the temperature drops below 22°C, betta fish are prone to getting sick or even dying. Therefore, a heater is needed to maintain the water temperature.
In addition, betta fish have certain requirements for water quality. The suitable water temperature for them is between 24°C and 27°C, and neutral water with a pH value of 6.5 to 7.2 is ideal. Under artificial breeding conditions, the dissolved oxygen content is preferably maintained at 5mg/l. When changing the water, it is best to add a certain amount of boiled water to the dechlorinated water to keep the temperature difference within 2°C to prevent the fish from getting sick.
To ensure the health of betta fish, it is recommended to keep each betta fish in at least 6 liters of water. Some people even suggest using a 20-liter tank to ensure the fish have enough space to move around and the water quality remains stable. Change the water at least once a week, replacing one-third to one-half of the water each time. Don't change too much. At the same time, regularly check the health of betta fish, observe their activity levels, and detect and address any diseases in a timely manner.