The best way to control Chlorella is biological control. The growth of Chlorella needs certain nutrients. If there are enough aquatic plants in the fish pond, they will not leave any living space for Chlorella as long as they grow well. In addition to aquatic plants, you can also raise some filter-feeding animals, such as mussels, silver carp and so on, they can also eat Chlorella.
In addition to biological control, drugs can also be used to remove Chlorella and improve water quality. Commonly used drugs for copper sulfate, can be sprinkled throughout the pond, the concentration should reach 0.7 ppm, then need to wait two days, and then replace half of the water. It should be noted that this drug is affected by temperature, and the water temperature should not exceed 60 C when dissolving, otherwise it will fail.
Chlorella is a photosynthetic autotrophic plant, growth and reproduction is mainly related to the light situation, if the light is particularly strong, it will multiply in large numbers, and then lead to green water. If the scale of fish ponds is not large, greenhouse shade can be considered, by blocking light, it can effectively limit its growth, thereby improving the water environment.
Chlorella is more likely to break out in water with higher fertility, and the reason for the improvement of water fertility is that too much feeding, whether it is the residual bait in the fish pond or the excrement of the fish, will become their nutrients after decomposition. By reducing feeding and reducing the source of nutrients, green water can gradually become clear.
