The milky white of fish tank water indicates that microorganisms multiply in large numbers, and it is very likely that the nitrification system has collapsed. Nitrification system is composed of nitrifying bacteria, which is a kind of beneficial bacteria, which can improve the water environment and transform ammonia nitrogen in water, thus preventing fish from being poisoned. In the daily feeding process, too much water change or disinfection and sterilization will affect nitrifying bacteria, thus affecting the living conditions of the whole tank fish.

1. Change water regularly: To improve the water environment, the most direct way is to change water regularly. There is no fixed cycle for changing water. According to the change of water quality, it is necessary to make preparations in advance. Because tap water is usually used, it is necessary to get trapped for a few days to remove chlorine. Then, before the water quality deteriorates, it is necessary to replace a part, usually about a quarter at a time.

2, strengthen filtration: If there is filtration in the fish tank, the water quality can be well maintained, but the filtration effect will weaken after a long time, so it is necessary to strengthen filtration at this time. If the pump can be adjusted, try to increase its power, and pay attention to cleaning the filter cotton, usually every three months, and wash it with the original tank water.

3. Reduce feeding: The ammonia nitrogen content in water is too high, which is also related to normal feeding. Usually, feeding should not be too much, and it can be fed two or three times a day. After each feeding, it is necessary to ensure that the fish can finish eating within 3-5 minutes, so as not to deteriorate the water quality.