Add oxygen or add active agents.

One, oxygenation.

Using a small aerator to add oxygen to the water, and placing the container in a quiet and dark corner will help increase the feeding time of the fish.

Aerator

2. Active agent.

Adding malachite green, nitrofurazone and other fungicides in the water can improve the activity of fish and increase the feeding time. This method is not recommended as these fungicides are relatively harmful to the human body.

It is recommended to eat it as soon as possible or give it away, or choose method one.