The salt used in fish farming is generally industrial salt, that is, coarse salt. You can also use special salt for aquarium, and you cannot use edible salt containing iodine. It should be noted that salt can not be directly added to the water tank, but should be dissolved first, and then mixed into the fish tank. In addition, if you are not raising sea fish, you do not need to add salt to the water, only when you are sick.
1. Sterilization and disinfection: Adding salt to fish culture can play a role in sterilization and disinfection. The concentration is generally about 1%, and the maximum can not exceed 3%. The higher the concentration, the less the soaking time. Usually 1% brine can be soaked for about 5 minutes, and 3% brine can not be soaked for more than 1 minute.
2. Increase osmotic pressure: Usually, if a fish is sick, it needs to be treated in the same way as the old three, and adding salt is the last step. The concentration of salt in the old three samples is about three thousandths, which can not play a bactericidal effect, but can improve osmotic pressure and reduce the possibility of bacteria entering the fish body with water.
3. Reduce the burden on the kidneys: The osmotic pressure of the freshwater fish itself is higher than that of the water, so the water will enter continuously and need to be drained through the kidneys. By adding salt, the osmotic pressure of the water body can be increased, thus reducing the water entering the fish body and reducing the burden of the kidney.
