If the water temperature can be kept above 24 ℃ all the time, Arowana can be raised without heating. However, they are sensitive to the fluctuation of water temperature, and the natural temperature difference between morning and evening is relatively large, so the water temperature fluctuation may be too large if the breeder does not heat it. At this time, it is best to heat up at night and keep the temperature consistent with that during the day.

If the breeder lives in an area where there is not too much temperature, it is difficult for the arowana to survive without heating it up. Because they are tropical fish, they have higher requirements for water temperature. When the water temperature is lower than 22 ℃, their appetite and activity will decrease. When the water temperature is lower than 18 ℃, they may freeze to death.

Arowana can live in the water temperature between 24-32 ℃, but the requirements for water temperature are different in different stages. Under normal feeding, the water temperature of arowana in juvenile should be kept between 28-32 ℃. Because the juvenile arowana has poor adaptability to the environment, a higher water temperature can improve their growth and development speed, and also speed up their adaptation to the environment.

When they are adults, the water temperature can be lowered a little. It can be controlled between 24-28 ℃. Because their ability to adapt to the outside world has become stronger in adulthood, and the speed of metabolism does not need to be too high, the water temperature can be lowered.