? If they are raised in outdoor ponds, they can not use oxygen. Because the pond water body is large and the deterioration rate of water quality is relatively slow, the dissolved oxygen is relatively sufficient. But to ensure that the feeding density is normal, if the feeding density is high, it also needs oxygen.
If it is raised in a fish tank, it needs oxygen. Because the space of the fish tank is small, the water quality is easy to deteriorate. When the water quality deteriorates, the dissolved oxygen in the water will decrease, so oxygen is needed. It should be noted that when the temperature is high or the weather is muggy, oxygen is needed, because whether the temperature is high or muggy, it will lead to a decrease in air pressure. Koi are prone to hypoxia in water, so it's best to turn on oxygen all the time.
time for Koi to open oxygen? If the breeding density is high, it is necessary to open oxygen for 24 hours, because the high density is prone to hypoxia and lack of vitality. If the feeding density is normal, 3-6 hours of oxygen a day is enough. When the temperature is high, Koi is prone to hypoxia, especially at night, breeders can turn on the oxygen pump after entering the evening, and then turn it off after dawn. If the koi have a floating head or big mouth breathing, it means that they are anoxic, and the breeder needs to give them oxygen immediately.
