The main reason why the fish will lie in the tank is that the water quality is unstable. This does not mean that the water quality is not good, but that the recent changes are too great. For example, the amount of water changed is relatively large, or the filter materials cleaned or replaced, which will lead to fluctuations in water quality. Therefore, we must control the amount of water when changing water at ordinary times, and at the same time, we should not wash the filter material easily, which is harmful to the health of fish.
In addition to changes in water quality, other changes in the water body can also cause it to lie in the tank, such as the introduction of new fish, changes in light and water flow. These changes may not be harmful to the fish, and it will take some time to adapt slowly, but for the sake of insurance, try not to change the external environment of the tank at will.
If the fish is sick, it will also cause it to lie in the tank. However, this kind of cylinder often has other performances, so it is easier to distinguish. The appetite of the sick period is not very strong, and they will not grab food after feeding. At this time, what we need to do is to change the water in time, at the same time, we should properly raise the water temperature, and add salt to the water, and keep the salinity at about 0.3%.
Fish will also appear in the tank if frightened, which may also be caused by environmental changes, or abnormal sound and light interference to it. It should be noted that the tank is the first step in the stress response of fish, if not paid attention to at this time, the situation will deteriorate, leading to its blindfold and body surface congestion.
