Koi is a freshwater fish, so generally speaking, it is not necessary to add salt to the water. If there is too much salt, it is not conducive to its growth and development. If the fish are healthy and the water is clean, there is no need to add salt to the water. However, the role of salt is relatively large, first of all, it can play a role in sterilization and disinfection, as well as enhance the appetite of Koi, so you can add a little salt to disinfect in the process of changing water; Moreover, it can play a role in curing diseases, so when the koi is sick, it can also be treated with salt. However, the salt used must be coarse salt, do not use refined salt, because it contains more iodine elements, it is easy to cause harm to the koi itself.
Generally speaking, the frequency of adding salt can be based on the frequency of changing water. Water change is usually about once every three days, but when the water quality has been better, it can not be changed for a long time. After changing the water, you can add a little salt, but the amount of salt must not be too much, too high salt concentration will be harmful to the growth of Koi, but also threaten the growth of other plants in the tank. Therefore, it is necessary to consider the proportion of salt and water in the fish tank, the concentration between one thousandth and three thousandths is the most appropriate, and the amount of salt added needs to be controlled. In the process of adding salt, try not to sprinkle salt directly into the water, but need to dissolve salt into a certain amount of water first, and then pour water into the fish tank.
