? The reason why the water in the fish pond turns green is because of the large number of algae. This kind of algae is Chlorella, which is usually harmless to fish. It can also purify the water quality and release oxygen. If you feel that it affects the viewing, you can raise some small fish, they will eat algae, you can also use algaecide, so that it can be cleaned up faster, but the dosage must be strictly controlled, so as to avoid excessive phytotoxicity to fish.
? 1. Temperature: The appearance of green water is first related to temperature. The growth of this kind of algae requires suitable water temperature. It usually stops growing when it is below 15 ℃. Therefore, the green water will return to clarity in winter and reach its peak in summer. But if the temperature exceeds 35 degrees Celsius, the green algae will also die in large numbers.
2. Nutrients: The growth of algae also requires a certain amount of nutrients, usually inorganic salts. The growth of green algae mainly needs two elements, nitrogen and phosphorus, which are produced when the residual bait and feces are decomposed, and the air and dust also contain nitrogen and phosphorus, so it is very difficult to cut off the source of nutrition.
3. Illumination: The growth of green algae can not be separated from sufficient illumination. If the environment is dark, it will die because it can not carry out photosynthesis. Therefore, the most effective way to prevent the growth of algae is to control the illumination time, so that the water will not become too green.
