There are two main concerns involved in feeding koi. First, is offering the right food, and second, offering food in the right amounts. Regardless of whether you choose to feed several times a day or 5 times a week, make sure that the amount given can be consumed within 5 minutes. With a little experimenting, you will be able to establish how much you should give your koi.
When feeding koi, water temperature is a very important factor to consider. The frequency of feeding and the type of food depend to a large part on the water temperature. When it’s warmer (60-85F) koi has higher metabolism and they can be fed 2-4 times daily. But when the water temperature exceeds 90 degrees, feeding should be stopped. During warmer days, your koi may start “begging” for more food. You should avoid giving more. If they are really hungry, they can always eat algae on the pond liner.
During spring and autumn when water temperatures are quite low, koi should be given a diet that is low in protein once every 1-2 days. If you want to know more, visit this website.