Koi common cold may be cured if it is too serious. To treat a cold, we must first raise the water temperature, because most of the cold is related to temperature changes. After the water temperature rises, as long as it remains constant, the fish's condition will generally not worsen. In addition, warming can also promote the metabolism of fish, so that it can discharge harmful substances in the body as soon as possible, which is also helpful for its rehabilitation. In addition, you can also oxygenate the water and add salt appropriately.

1. The temperature difference is too large: Koi is the same as human beings. If the temperature in the maintenance environment rises and falls, koi will catch a cold. At this time, it is necessary to isolate sick koi from other koi to avoid cross infection. Koi common cold generally does not need to use drugs, and can be cured by normal maintenance. It should be noted that koi fish isolation requires the use of water in the original tank, not new water.

2, the weather is too cold: It is very cold in winter, especially in the north. The maintained water level is too low. When the surface of the fish tank freezes, the water temperature under the fish tank will also drop, which will lead to koi catching a cold. If you want treatment, you should stop eating immediately and use an oxygen pump. In addition, it is necessary to raise the temperature of water by three ℃. After such maintenance for a period of time, koi fish will recover. Or directly move koi back to the house for maintenance, and control the temperature at about 26 ℃.

3. Improper transportation: When transporting koi, if the water temperature is not properly handled and kept at a proper temperature, koi will catch a cold. In view of this situation, it is necessary to add salt to the water according to the ratio of five thousandths, and sterilize it first. Then adjust the maintained water temperature to about 26 degrees Celsius to promote the metabolism of koi fish. Slowly koi will recover.