Control techniques of red skin disease of grass carp

Red skin disease of grass carp is one of the bacterial diseases. The disease often occurs after transportation, net-pulling and other operations, or after skin damage of fish in cold winter. The side and abdomen of the diseased fish are bleeding and inflamed, and some scales fall off; the color of the head becomes darker obviously; the end of the fin is rotten and scattered, and the base of the fin is red; there is no food in the intestine, the intestinal wall is congested and inflamed, and the intestinal cavity is filled with mucus. If not treated in time, the fish will die gradually.

To prevent the red skin disease of grass carp, it is mainly to clean up and disinfect the fish pond at the right time, and disinfect the fish pond with medicine in time after transportation, pulling net and so on. If the disease occurs, it should be treated immediately. The method of treatment is to inject new water into the fish pond and replace the old water; sprinkle bleach solution in the whole pond to make the drug concentration of the pond water reach 1 mg per liter; 500 grams of Dijin, 300 grams of iron amaranth and 200 grams of fresh grass juice of Polygonum polygonum are used every day, mixed with bait and fed for 3 days. In this way, the fish can not only stop dying, but also recover gradually.