About 10W oxygen pump should be used in 1.5 m fish tank. The function of oxygen pump is to increase the dissolved oxygen in water. Fish live in water, but they also need to breathe. If the oxygen content in water is low, it is easy to float, and even endanger the health of fish. Under normal circumstances, if the feeding density is relatively high and the fish raised are relatively large, the consumption of oxygen will be very high, which requires oxygen pump for oxygenation.

1. Daily: The oxygen pump is usually turned on every day. According to the fish's demand for oxygen, the oxygen pump can be turned on all day or in stages. If the oxygen consumption is relatively large, it needs to be opened all the time. If the oxygen consumption is not large, it can be opened for two hours in the morning and two hours in the afternoon, but the opening time should be extended in high temperature and rainy days.

2. Sick: If the fish is sick, it is necessary to turn on the oxygen pump in order to recover as soon as possible. On the one hand, the environment with high dissolved oxygen can promote the metabolism of fish, thus allowing it to discharge harmful substances. On the other hand, after treating fish with medicine, it will also increase oxygen consumption, which needs to be replenished in time.

3. Culture of bacteria: To raise fish, it is necessary to open the tank to raise water first. The most important thing to raise water is to cultivate bacteria and cultivate a beneficial bacterium called nitrifying bacteria. It belongs to aerobic bacteria, so turning on the oxygen pump can accelerate its growth and reproduction, and at the same time pay attention to turning off the lights.