Koi fish can survive without mucus. The loss of mucus means that the dehydration time is too long, so it needs to be put into water in time. As long as the fish is healthy and there are no other diseases, the mucus will soon recover. The mucus on the surface of fish is its secretion, which can protect itself to a certain extent, and at the same time reduce the friction in water, thus improving the swimming speed in water. Moreover, with this mucus, bacteria and parasites are not easy to harm the body.

1. Change water properly: Koi without mucus may be caused by poor water quality. In view of this situation, it is necessary to change water in time. Usually, the water should be changed every once in a while, about one quarter of the water should be changed every time, and no more than one third of the total water should be changed at most. If too much water is changed, it may stimulate the fish, which is unfavorable to their recovery.

2, add some yellow powder: If koi fish is infected with some bacteria and fungi, it may also cause mucus for hours. If you want to solve it, you'd better put a little yellow powder. Yellow powder is a common medicine for ornamental fish, which has good therapeutic effect for many diseases, can kill harmful bacteria, and is very helpful for the rehabilitation of fish.

3, high oxygen state: The best way to make mucus recover quickly is to keep the water body in high oxygen state. The advantage of high oxygen is that it can promote the metabolism of koi fish and accelerate its body function, which will secrete mucus.