If there are green algae in outdoor koi pond, it can be cleaned with algae remover, or some tool fish can be raised to eat algae. Green algae usually do little harm to water bodies. Some people even introduce green algae into making green water in family fish farming. Although this water does not look clear, it is quite helpful to the growth of fish, and it is not easy to get sick. However, it is necessary to control the light, otherwise it will lead to a large number of algae deaths.

1. Control illumination: To prevent green algae from growing, we must first control illumination. Different from brown algae, this algae has certain requirements for light. If the light is too little, the growth of algae will be limited. Therefore, the growth of green algae can be effectively restrained by proper shading and reducing the time of illumination.

2. Reduce feeding: The growth of green algae is not only inseparable from light, but also has certain requirements on the nutrition of water body. If the water is fatter, its growth speed will become faster. If you want to prevent water from fattening, you need to pay attention to controlling feeding. By reducing the total amount of food fed, you can also prevent excessive reproduction of algae.

3. Use algae remover: Algae remover is also a good algae removal method, but there are certain requirements on the dosage of drugs. More dosage can kill algae, and less dosage can prevent algae growth well.