If you want to grow fast, you must first provide a large space. Because the fish itself can grow very large, if the space is narrow, the growth will be limited. Usually, a fish pond is used to raise koi. If it is a fish tank, it should be at least 1.2 meters long and the width should not be less than 60 cm, so that koi can swim.

Feeding koi frequently can make it grow fast. It is usually fed two or three times a day, with enough interval between each feeding. If enough time is not set aside, the fish will not digest well. It should be noted that attention should be paid to the feeding amount every time, so as to ensure that the fish can be eaten in about 3-5 minutes.

Koi fish belongs to wide temperature fish, which does not require very high water temperature and can survive in the environment of 5-30 ℃. However, if the temperature is relatively low, the metabolism rate of fish will slow down. Higher water temperature can promote its digestion and help its growth. Usually, the temperature can be kept at about 20 ℃.

Because koi fish has a high demand for dissolved oxygen, it is necessary to provide sufficient oxygen during feeding, so that it can breathe better and help digestion, thus promoting growth. Usually, koi fish should be equipped with an oxygen pump, and the oxygen pump should be turned on 24 hours a day.