Koi is a large fish, the body stores more energy. As long as the water quality is kept clean, even if it is not fed, it is no problem to persist for half a month. Koi is a poikilothermic animal, the temperature is low in winter, insist on two or three months without feeding is no problem. Koi do not feed for a short period of time is not a big problem, but if the water quality deteriorates, there will be problems. But if not fed for a long time, it will affect the healthy growth of Koi.
If the farmer has no time to feed in a short period of time, he can build a feeding table in the tank and put some feed on it, and the fish will eat by themselves. Or keep some live bait in the tank, so that the bait can reproduce and feed the koi. In addition, an automatic feeder can be arranged in the fish tank.
Koi is a large fish, the body stores more energy. Even if you don't feed for ten days, as long as you adjust the water quality and open the filtration system, you will generally be fine.