If the blue line hangs do not eat food, you should first analyze the reasons why the blue line hangs do not eat, and then prescribe the right medicine. Generally, the blue line hangs not eating food can be divided into the following two reasons:

1. When the water is not changed in time and the water quality is deteriorated, the blue line hanging will not eat food. At this time, it is also necessary to help the blue line hanging to change the water, and use a water filter to increase the oxygen in the water, so that the blue line hanging starts to eat food.

2. Diseases can also cause the blue line hanging without food, When the blue line hanging is sick, it is necessary to stop feeding, maintain the water quality, prescribe the right medicine, and treat the disease in time. After the disease recovers, the blue line hanging will naturally eat.