If the oxygen content in the fish tank is relatively low, the fish will immediately show some behavior. First of all, I don't like swimming, and I usually float on the water, which seems to have no vitality. And their bodies can be tilted to expose their bellies. In addition, under the condition of hypoxia, appetite is not high, feeding will not eat, and even there will be the possibility of jumping the tank.
1. High breeding density: The dissolved oxygen in the water body is limited. The greater the breeding density, the greater the consumption of oxygen, which will cause hypoxia. There are only two solutions to this situation, one is to reduce the number of fish, and the other is to change to a larger tank.
2. More aquatic plants: In addition to more fish, more aquatic plants are also an important reason for the lack of oxygen in the fish tank. Many people think that aquatic plants can release oxygen, but this is only in the case of light photosynthesis, only at night to breathe, thus competing with fish for oxygen, the solution is to replenish oxygen in the evening.
3. Poor filtration system: The filtration system itself can bring air into the water, thus increasing the dissolved oxygen. If the efficiency of the filtration system decreases due to aging and other reasons, the water body will also be anoxic. At this time, it is necessary to clean or replace the filter cotton and other parts so as to restore its function.
4, change the water is not timely: fish must change the water, the oxygen content of the new water is higher. Usually, it should be changed regularly. If there is no filter, it can be changed once a week. If there is filter, it can be changed once half a month.
