The simplest way to disinfect fish is to disinfect it with salt water. The concentration of salt water is between 3% and 5%, and then the fish are put in it and soaked for 10-15 minutes. Pay attention to observation during soaking. If the fish is uncomfortable, it needs to be fished out in time. In addition to salt water, potassium permanganate, chlorine dioxide, povidone iodine, etc. can also be used for disinfection, but the dosage should be controlled. At ordinary times, it can also be irradiated with germicidal lamps, which also has good results.

1. Potassium permanganate: Potassium permanganate is a common disinfectant. Although it is relatively outdated, it is still very useful. It can disinfect fish and fish tanks. It should be noted that because it is corrosive, the disinfection time should not be too long, otherwise it may cause drug damage.

2, chlorine dioxide: Chlorine dioxide is a new disinfectant. Compared with potassium permanganate, its dosage is less, but its effect is better, and it is almost nontoxic and harmless to fish. However, it is worth mentioning that this drug has a pungent smell, so we must pay attention to ventilation when using it.

3. Povidone iodine: Povidone iodine is also a common disinfectant. It is no problem to disinfect fish, but it cannot be poured into the fish tank, because it will cause metal discoloration, so it can only be soaked and washed separately, which is relatively troublesome to use.