When the fish ponds are sterilized, the farmers use quicklime to disinfect the ponds at this time of the year, and the following points should be taken into account when using quicklime ponds.
(1) The use of fresh quicklime, which has good quality and high calcium oxide content, can effectively kill pathogenic microorganisms on the bottom of the pool. (2) Sprinkling should be timely, and lime slurry should be used immediately. When lime slurry is poured, the slag should be filtered out to avoid fish swallowing. It is generally chosen to be on a sunny day at noon. (3) Quicklime should not be used when the pH value of the pond or pond water is greater than 8. (4) The combination of quicklime and bleaching powder (chlorine preparation) will reduce the disinfection effect. Chlorine should be used after bleaching powder and other chlorine preparations are used for 5 days. The effect is good. (5) Quicklime is generally suitable for the prevention and treatment of bacterial fish diseases, but it has poor control effect on some parasitic and viral diseases. For the prevention and control of parasite diseases, drugs such as trichlorfon and copper sulfate should be used to prevent viral diseases. Diseases should use "three yellow", allicin and other Chinese herbal medicines, generally made into bait for feeding control.
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