It is recommended to change the water in the swimming pool. The appearance of white suspended matter indicates that the water quality has deteriorated. The best solution is to replace the water in the swimming pool.

The impurities in swimming pool water are mainly dirt, bacteria, cosmetics, grease and sweat secreted by human body, as well as sundries, dust, leaves, fungi and algae bred in the pool. Most of these impurities are insoluble in water. Because of the different specific gravity, some float to the surface, some mix in the water, and some precipitate to the bottom. The ups and downs of impurities have a process and time interval. The speed of floating and sinking is not only affected by the specific gravity, but also by the current.