A Koi's metabolism functions best at temperatures above 70° F. High protein foods are difficult to digest when the water falls below 65° F.
However, Koi still need sufficient carbohydrates for energy when water temperatures are low. This is particularly true for Koi less than 1 year old.
Squash, bread, peas, citrus fruits, and watermelon are good sources of carbohydrates. Never overfeed your fish! Koi do not have a stomach. Feed smaller quantities more frequently for better nutritional absorption.
Feed only as much as the fish will eat in about 3-5 minutes. Koi pellets should be fresh and used within three months to prevent oxidation of the food.
|Water Temp. (°F.)||Feeding Frequency||Food Type|
|Less than 50ºF.||Do not feed Koi.||Temperatures at 50° F. of more than one month may require supplemental feedings of low protein and high carbohydrates.|
|50-55ºF||2-3 times a week if Koi are hungry.||High carbohydrate, low protein, laxative type foods. Wheat germ, Cheerios®, squash, lettuce and brown bread.|
|55-59ºF||4-5 times per week if Koi are hungry.||Add low protein (25%) pellets along with vegetables. Increase quantities gradually as temperature increases.|
|59ºF||Once per day six days per week.||Low protein (25%) pellets along with high carbohydrate vegetables and fruit.|
|60-65ºF||Once per day every day.||Gradually increase protein in pellets (35%) and quantity of pellets. Vary diet with vegetables and fruit.|
|65-72ºF||Once or twice per day.||Bulk of diet should be 35% protein pellets. Add fruits, vegetables, and plankton for variety.|
|72-80ºF||3 to 4 times per day.||High protein pellets (35% to 40%) with color enhancers. Add plankton, vegetables, fruits, and shrimp.|