Betta fish need to change water, although they have strong adaptability to the environment, they can also accept poor water quality. However, if you don't change water for a long time, it is easy to produce bacteria in the water, which will lead to their birth diseases and other problems. When raising betta fish artificially, it is necessary to change water regularly. If the container for raising them is relatively large, you can choose to change the water every 3-5 days. Because they are small in size and do not pollute the water seriously, the frequency of changing water does not need to be too high. If a filter is installed, the water can be changed once every 7 days. If the water body in which betta fish lives is small, the water quality will deteriorate faster, and the frequency of water change by breeders should also increase, preferably once every two days.

Although betta fish have strong adaptability to the environment, they cannot accept sudden changes in water quality. When changing water, it is necessary to pay attention to the fact that the amount of water should not be too large, and it is best to control it in a quarter of the total amount of water.

Betta fish do not have high requirements for water. They prefer to live in neutral water, but they can also accept weak acid and weak alkaline water, but cannot accept strong acid or strong alkali.

Tap water can be selected as the water for raising betta fish. Because tap water is easier to obtain and the water quality is cleaner. However, the tap water just received contains more chlorine, which will have a certain impact on the health of betta fish. It is best for breeders to expose them to the sun for 2-3 days, so that chlorine will volatilize.