The amount of salt should be based on the tolerance of the fish, and no more salt can be added. Salt can inhibit bacteria and parasites to some extent, but it can't kill freshwater fish because of its good bactericidal effect. Salt can't be edible. Edible salt contains iodine. Use special salt or crude salt for fish. The role of salt is only to inhibit the growth of common bacteria in the early stage, but it has no obvious effect on the infection in the later stage, and it is still necessary to rely on mainstream drugs for treatment in the later stage.
Pay attention to raising fish. The water quality should be no problem, the temperature and light should be appropriate, the food should be quality and quantitative, the operation should be gentle and slow, the drugs should be cautious, and the toxic substances should be kept away.