when it dies of anoxia. After a period of death, the fish will sink to the bottom when it dies of anoxia. As the body decays, it will produce gas, which will make it float to the top. The main reason for hypoxia is that there is less water in the fish tank, or there are too many fish, which leads to high feeding density and large consumption of oxygen in the water body. It may also be the problem of water temperature, such as high temperature and low dissolved oxygen, which leads to hypoxia.
1, equipment oxygenation: fish hypoxia, the simplest way is to use equipment oxygenation. Prepare an oxygen pump with appropriate power, put its outlet pipe in the fish tank, and then keep it on. If you feel that long-term oxygen pump is too power-consuming, you can open it for 2-4 hours a day, but it must be opened at different times.
2. Drug oxygenation: In addition to oxygen pump oxygenation, drugs can also be used for oxygenation, the most commonly used is oxygenation tablets. However, this drug is rarely used in family fish farming, usually only when the fish pond is severely anoxic, and can only be used as an emergency drug.
3. Change the water for oxygenation: If there are not many fish, you can increase the oxygen by changing the water. The oxygen content of the new water is relatively high, and part of the oxygen can be brought in during the process of changing the water. It should be noted that the new water can not be trapped by heating, otherwise the oxygen will dissipate.
