If the newly bought Koi don't eat, it may be because they haven't adapted to the new environment. If Koi suddenly don't eat, it may be because it has diseases such as enteritis and gill rot. If the breeding environment is poor, there are many algae in the water or the dissolved oxygen is very low, they may not eat. If they are not interested in a certain food, they may also have the problem of not eating. 1、 What are the reasons why Koi don't eat? 1. They don't adapt to the new environment: there are many reasons why Koi don't eat. If the koi just bought and put in the fish tank doesn't eat, it may be that it hasn't adapted to the new environment. Koi, who have just changed their water environment, need a period of time to adapt. In this process, it may not like to eat.
2. Illness: Koi do not eat, and may be sick, especially some bacterial diseases. For example, enteritis, rotten gills and so on may reduce their appetite.
3. Algal mass reproduction: if there is a large number of algal reproduction in the water, it will also affect the appetite of Koi. Specifically, there are many kinds, such as cyanobacteria, which reproduce very fast.
4. The amount of dissolved oxygen in the water is too low: if there is too little oxygen in the water, leading to the anoxia of Koi, it may also reduce their appetite and don't like to eat. There are many reasons for low oxygen content, such as dirty water quality.
5. Lack of interest in a single food: if the koi is fed only one food for a long time, it may not like eating and lack interest in this food. 2、 How to treat Koi if it doesn't eat? 1. If it doesn't adapt to the new environment, it can stop feeding for a few days to keep the surrounding environment suitable. Let it adapt first and then feed.
2. If it is caused by the disease of Koi, stop feeding, then treat the disease, and continue feeding after the disease is cured. If the condition is serious, you also need to consult a professional.
3. If there is a large number of algae, these algae need to be cleaned. You can use tools such as filters and change the water in time.
4. If the oxygen content in the water is too low, you can use the oxygen pump to supplement some oxygen and change the water at the same time.
5. If they are not interested in a single food, try feeding them other food. Don't choose only one food when feeding. （JinLiBuChiShiShiShenMeYuanYin，ZenMeZhiLiao）