There are many ways to make the stagnant water in fish ponds flow. First of all, you can find a water source. If there is a water source nearby, through proper drainage, you can connect the fish pond with the outside world, so that the water can flow. However, it should be noted that the net should be blocked at the water inlet and outlet, so as to ensure that the outside fish will not enter and the raised fish will not escape. In addition, if the location of fish ponds does not allow water to flow naturally, you can also pump water.

1. Cleaning ponds is also a good way to improve the water quality of ponds. Generally, during the idle period of ponds, that is, when fish are not raised, all the water in them is released, and the thickness of silt is checked. If it is too thick, some of them should be dug out. Then a small amount of water is injected, and quicklime is sprinkled in the whole pool. Because quicklime will emit heat and generate strong alkali when it meets water, harmful bacteria can be eliminated, which is more conducive to the maintenance of water quality.

2. Remove algae in time: If algae are found in stagnant ponds, they must be removed in time, because algae are easy to explode, they will occupy the water body and absorb oxygen in the water at the same time, causing fish to be unable to breathe. There are many ways to remove algae, which can be salvaged manually or killed with algae remover, but the dosage must be controlled.

3. Planting aquatic plants: Some aquatic plants or other aquatic plants can be planted in the pond. These plants can absorb ammonia nitrogen in the water body and release oxygen, which can also maintain the water quality and slow down the deterioration of the water body.