If there are parasites on fish, you can use drugs such as Intestinol, potassium permanganate, diclazuril, chlorpheniramine hydrochloride, trichlorfon, and mebendazole. If there are external parasites on the fish, the parasites need to be picked out, the wounds should be disinfected, and then the water in the fish tank should be changed and the fish tank should be disinfected. When feeding fish, attention should be paid to strengthening the nutrition of the fish, choosing better compound feeds for feeding, and regularly adding some nutrients and immune modulators to the feed to improve the fish's own resistance.

Fish are omnivores, so they should pay attention to the reasonable combination of food. Do not feed too single food. You can feed some red worms, fish worms, water earthworms, bean cakes, noodles, rice, bread, aquatic plants, small Duckweed etc.