To make fish tank water clear, you only need to change water regularly. Changing water is an essential step in the process of fish farming, which can not only improve the water environment, but also help the growth of fish. In addition to changing water, the water quality should be maintained by filtration at ordinary times, and the filtration should be turned on at all times, so that the water quality will not deteriorate, and it is also conducive to the growth and reproduction of nitrifying bacteria.

1. Filtration: The best way to maintain water quality is filtration. There are a lot of filtration equipment, and the big ones are not necessarily suitable. We must watch the flow rate and ensure that the water in the cylinder can circulate about 7-10 times in an hour. In addition, the filter materials should be complete, including filter cotton, activated carbon and bacteria house.

2. Change water: Besides filtration, there is another way to improve water quality quickly, that is, change water. Usually, the water should be changed once a week, and it should not be changed too frequently, otherwise the fish will be stimulated. In addition, the amount of water to be changed should not be too large, usually about a quarter of it can be changed at a time.

3. Oxygenation: To maintain the water quality, we should not only look at whether it is clear or not, but also measure the ammonia nitrogen content in the water if conditions permit. If the content is relatively high, the scale of nitrifying bacteria is insufficient. In order to promote its reproduction, it is necessary to turn off the lights and explode oxygen for a period of time, so as to establish a nitrification system and improve the water body.