If the fish tank water is white and foggy, the best solution is to change water. It is essential to change water for fish farming. Usually, the water in the cylinder is pumped out by water pump. If there is no water pump, you can also pump water manually, prepare a pipe, suck out the water from the bottom of the cylinder by siphon method, and then slowly add new water from the cylinder wall. Usually, it should be changed once a week, and the water quality is well maintained, so it can be changed once every half month.

If the filtration effect of fish tank is better, it can also make the white water clear again. If you want to strengthen filtration, there are two main ways. The first way is to increase the power of the water pump in the filter and increase the water flow rate, so that the water circulates more times and the filtration is good. The second is to clean the filter cotton, which is usually washed with the original tank.

A large number of microorganisms in water will lead to whitening of water, and their reproduction depends on organic matter, that is, bait fed at ordinary times. Both leftover bait and feces discharged by fish after digestion will become nutrients of microorganisms. By reducing feeding, the water body can be prevented from becoming foggy.

If the density of fish culture is too high, the water quality will easily deteriorate, which will lead to white and foggy. In this case, the best way is to reduce the feeding density, keep fewer fish or change to a larger fish tank, so that the water quality can be maintained, thus avoiding its rapid whitening.