If koi lies in the jar, it needs to rest and observe. If it does not recover, it can be considered to heat up and oxygenate, or isolate the medicated bath. Lie prone may be caused by stimulation, which is not dangerous to fish. Usually, it will recover after resting for a period of time, but it may also be caused by other factors. It is useless to rest for this situation, and other means must be taken to treat it.

1. The water quality is too poor: Many novices change the cleaning filter materials too fast when changing water, which makes koi fish unable to adapt to the new water quality quickly and lie prone to the tank. This can also be said to be caused by stress reaction. In this case, filtration and sterilization can be carried out, the filter can be fully opened, and nitrifying bacteria can be cultured well. In this way, the water quality will become clear and koi fish will become active.

2. Introducing new environment: The newly entered koi carp does not fully adapt to the new water quality, and will lie prone and be lazy all day. This situation will disappear naturally after they adapt to the new environment.

3. Bacterial infection: The new koi carp has not been disinfected, which may lead to cross infection after entering the cylinder. In this case, it is necessary to disinfect the fish tank, cultivate nitrifying bacteria and explode oxygen to improve the water quality and keep the suitable water temperature. In this way, the phenomenon of koi carp lying on the cylinder will disappear.