Feeding rate for Koi
The feeding pattern of Koi depends on many factors, such as water temperature, water quality, stocking density and genetic background. Koi feed most actively at temperatures in excess of 15c (59f).
Nutritional content of Koi food
Food contains various elements, such as proteins, fats, carbohydrates, vitamins and minerals, which are essential for all animals to maintain healthy bodies, grow and reproduce.
Nutritional requirements of Koi
The type of food you give your Koi and the quantity you offer them will vary according to their size. The majority of proprietary Koi foods have a cereal base with different ingredients added either to enhance color or aid digestion. Choose a food size that is small enough to be eaten by the smallest fish in the pond; otherwise they may die of starvation. If you keep very small Koi with larger ones, offer a mixture of large and small foodstuffs, but always make sure that young fish are adequately fed. Most Koi food comes in two forms: floating and sinking. Koi are bottom-feeding fish and are, therefore, better suited to sinking food.
Provide just enough food so that after five minutes it has all been eaten.
Feeding to enhance color of Koi
Good coloration is not only enhanced by good feeding, however. Healthy fish tend to have much brighter colors than diseased ones. To bring out the color in Koi, particularly the white, you must provide good living conditions. Strong red and yellow pigments develop well in waters rich in green phytoplankton (single-celled plants). Because Koi are difficult to see in green water, it helps to feed a diet that will enhance the red pigmentation. Black pigment is enriched in hard water with a pH level of 7.5-8.5. Remember, however, that changing the pH and hardness of the water can affect the toxicity of ammonia and nitrite.