All kinds of diseases first come from the change of water quality, because there are too many organic substances in the water, which are not decomposed by beneficial bacteria in time, thus creating a good environment for harmful bacteria, constantly multiplying, leading to algae death, resulting in white stool, empty stomach in the jejunum and slimming. Therefore, it is necessary to control harmful bacteria in time and supplement beneficial bacteria to improve water quality, thus reducing the occurrence of diseases.