The lowest acceptable water temperature of Thai betta fish is 18 ℃. Although they belong to tropical fish, the acceptable temperature range is relatively wide. Even if the water temperature is 18 ℃, they can grow normally. Although they can survive at a low temperature of 18 ℃, try not to keep the temperature at the lowest acceptable temperature when cultured artificially. Because the water temperature is too low, their growth state will deteriorate, and over time, they are prone to illness and death.

In addition, the low water temperature may affect their reproduction. If the breeder has the conditions, it is best to keep the water temperature between 22-24 ℃. In this temperature range, their appetite and activity are the highest, and their growth and development speed is also the fastest.

Thai betta fish generally cannot survive without heating in winter, because as mentioned above, the minimum acceptable water temperature for them is 18 ℃. The temperature in winter in China is low, which generally cannot be kept above 18 ℃. When the water temperature is lower than 18 ℃, they will die, so they cannot survive without heating in winter. If breeders want them to survive the winter safely, they must install a heating rod to keep the water temperature above 20 ℃. If you don't want to install heating rods, you can also transfer them to a heated room and spend the winter safely.