If the weather temperature is not high, the density of the fish tank is not large, there is no need to open the pump at night, just need to open the filter. If it is hot and rainy weather, it is necessary to open the oxygen pump for the fish tank. The purpose is to increase the dissolved oxygen in the water and avoid the casualties of Koi due to hypoxia and asphyxia. When it is necessary to warm up the koi for treatment, the oxygen pump needs to be opened at night, preferably during the day, to avoid aggravating the koi's condition.
If the koi breeding in the light can not reach the place, is to turn on the lights, so that artificial light instead of sunlight irradiation koi. If the koi is raised in a place with sufficient light, it is not necessary to turn on the lights at night.
In the case of normal filtration, low fish density, wide water surface and no oxygen deficiency, the oxygen pump can be turned off at night. If the conservation environment has a wide water body, live water injection, suitable environment, good filtration, timely decontamination, attention to ventilation and proper sunshine, such as koi in the park landscape pool, in most cases do not need oxygenation. But if the weather is sultry and the temperature exceeds 30 degrees, it is necessary to open the oxygen pump to avoid the lack of oxygen due to high temperature.
