The water in the fish tank turns green mainly because of the massive reproduction of Chlorella. Although it looks very unsightly, the green water is not harmful to the fish, and it is even good. It can stably purify the water quality, and at the same time it can absorb and transform toxic substances, so it does not need to be treated. If you want to make the water clear, you can use algaecide or germicidal lamp to kill it quickly.
1. Environmental problems: The reason why the water in the fish tank turns green is mainly due to environmental problems. Small green algae is a kind of plant, through photosynthesis can be autotrophic growth and reproduction, if the fish tank is placed in a sunny place, adequate light will easily make it a large number of outbreaks. Therefore, proper shading can slow down the speed of reproduction.
2. Poor filtration: Another reason for the outbreak of Chlorella is the high content of ammonia and nitrate in the water body. This is due to the lack of biological filtration and the lack of nitrifying bacteria to deal with them, which gives Chlorella an opportunity. Therefore, as long as a good nitrification system is established, ammonia and nitrate in water can be eliminated.
3. Too much fish and shrimp: If there are too many cultured fish and shrimp, the amount of feeding is relatively large at ordinary times, and their excretion is also very large, which will allow a lot of organic matter to enter the water. The nutrients rich in these organic matter can also promote the growth of algae, which will lead to the greening of the water body. Therefore, reducing the number of fish and shrimp or controlling the amount of food can improve the water quality.
