To solve the problem of koi fish not eating food, it is necessary to first identify the cause and then develop a solution. There are many reasons why koi fish do not eat food, such as:

1. Koi fish have just arrived in an unfamiliar environment and have not yet It adapts well to the new environment, so it will be reluctant to eat food. At this time, the owner should give the koi fish a quiet and comfortable environment, and then let the koi fish recover slowly, and then feed the koi fish after the condition improves.

2. There may be a lack of oxygen, which leads to Carp do not eat food. At this time, the owner needs to add oxygen to the fish tank and provide enough oxygen to the koi fish so that the koi fish can eat normally.