to change water? The koi does not need salt to change water. The main purpose of salt is to adjust the osmotic pressure of water and sterilize it. If the water quality is good, salt is not conducive to the growth and reproduction of fish. Because salt not only kills harmful bacteria in the water, but also kills beneficial bacteria in the water, such as nitrifying bacteria. Nitrifying bacteria are important for the ecology of fish tanks, which can convert fish feces into almost non-toxic nitrates. In this way, poisoning of koi can be avoided. However, in the absence of salt, we must ensure that the water quality environment is good, change the water in time and clean the fish tank.
for koi carp Koi carp can not adapt to the sudden change of water quality, so it is necessary to change water scientifically. First of all, the water temperature should not change suddenly before and after the water change. The sudden change of water temperature will cause the fish to catch a cold and get sick, and then appear to lie in the tank, depressed and so on. In this way, their constitution will gradually deteriorate, thus increasing their risk of disease. Every time the water is changed, it is necessary to control the temperature of the new water to be 1 to 2 degrees higher than that of the old water. Then, the amount of water should not be too much. Every time the water is changed, the water is pumped from the bottom. It can be changed 2 to 3 times a week. It is more appropriate to change about one third of the water each time. Finally, the new water should be used in advance, that is, the new water should be dried for several days before it is put into the fish tank. In this way, the chlorine content in the water can be reduced.
