If the fish tank is hypoxic, you can generally use an oxygen pump to oxygenate the fish tank 24 hours a day. If there is no oxygen pump, and the fish density is not high, you can consider raising the water outlet of the built-in filter pump to a position lower than the water surface, so that the water surface of the fish tank can form a fluctuating water flow, which can appropriately increase the amount of water in the water. of oxygen content.
If there are aquatic plants planted in the fish tank, appropriate light can be provided and photosynthesis can be used to form a certain amount of oxygen. oxygen. In order to avoid hypoxia in the fish tank, pay attention to changing the water frequently to prevent bacteria and algae in the old water from consuming a large amount of oxygen and causing hypoxia in the fish tank. Secondly, it is necessary to appropriately reduce the density of fish schools and reduce the oxygen loss rate.
