In the process of aquaculture, a large number of cyanobacteria often appear, and relapse soon after treatment, which causes difficulties in water quality management and disease control, thereby affecting the yield and product quality. The author summarizes the following methods for preventing and controlling cyanobacteria through practical experience.
The first is to "defend." If cyanobacterial shoots are found during the cultivation process, biological agents and microbiological agents containing cyanobacteria can be used for prevention.
The second is to "rule." If the situation is more serious, it is necessary to promptly prescribe the right medicine, use drugs that treat cyanobacteria (such as cyanobacterial net, Red Liankang, etc.) for treatment. However, when using drugs, it is necessary to understand the performance and role of the drug to prevent accidents. Try to use mild and chronic drugs for treatment. If acute or one-time medications are used, pay close attention to changes in water quality and serious hypoxia caused by medications.
The third is to "control." Properly extend the aerator start time after administration to prevent hypoxia, add a small amount of fresh water after 4 to 5 days, and use detoxification or ammonium humate to detoxify or change the bottom, and then separate it for 2 to 3 days. , The use of microbial agents and biological fertilizers for water transfer, the cultivation of beneficial algae in the water, thus controlling the recurrence of cyanobacteria.
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