The whitening of fish tank water is due to the failure of nitrification system or the death of a large number of nitrifying bacteria, which leads to the collapse of nitrification system. Nitrifying bacteria are an essential part of fish tanks, which are responsible for converting ammonia nitrogen into nitrates in water, thus preventing fish from being poisoned. If you want to culture nitrifying bacteria, you need to add bacteria culture solution regularly, and turn off the lights and explode oxygen at the same time, so as to promote its growth and reproduction.

1. Change water regularly: To improve the whitening of fish tank water, the first thing to do is to change water regularly. Don't change water too frequently, otherwise too much new water will stimulate fish, which is not good for their health. Usually, it can be changed once every five to seven days, and only about a quarter of the water needs to be changed every time, which cannot exceed one third of the total water volume.

2, pay attention to filtration: Good filtration can also improve the water quality, thus making the white water clear again. Filtration is divided into physical filtration, chemical filtration and biological filtration, in which physical filtration needs filter cotton, chemical filtration needs activated carbon, and biological filtration uses bacterial house to cultivate nitrifying bacteria.

3. Control food intake: The reason why water turns white is that the content of organic matter is relatively high, and the source of organic matter is fish food fed normally. By controlling food intake, it can also prevent water whitening. Usually, the fish are fed three times a day. After each feeding, it is necessary to ensure that the fish are eaten within 3-5 minutes without leaving any residual bait.