There are many methods that can be used to remove moss and green algae from fish ponds. The most direct method is manual cleaning, especially for mass reproduction, the efficiency of manual cleaning is relatively high, and there are no side effects. If manual cleaning is troublesome, you can use other means, such as raising some fish that feed on moss, or eliminating it with chemicals such as algae removers.

1. Water is too fat: The reason why moss and green algae grow is that the water in the fish pond is too nutritious, that is, the water is too fat. It should be noted that in the process of their mass reproduction, they will also absorb the nutrition of the water body, thus making the water thin, which will be unfavorable to the growth of fish. Therefore, it is necessary to properly fertilize and supplement after cleaning the moss.

2. Sufficient illumination: As a kind of plant, moss can't grow without illumination. If the illumination is too sufficient, it will cause it to multiply in large numbers. However, if it is properly shaded, it will stop growing due to lack of light and other reasons. It is worth mentioning that if the light is too scarce, the growth of fish will also be affected.

3. Lack of aquatic plants: If there are aquatic plants in the fish pond, the growth of moss will also be limited. Both aquatic plants and moss need nutrients in water, so they will form a competitive relationship. Therefore, as long as aquatic plants are planted well, moss will disappear slowly.