This product is formulated to meet the nutritional needs of koi and goldfish in the warm water season, when the water temperature is 65 to 70 degrees and above. Summer is a time of rapid growth and spawning for pond fish. These activities demand a higher protein diet. Formulated from shrimp meal, rice bran and soybean meal - all rich in easily digestible protein. Combined with essential amino acids, fatty acids, vitamins and minerals plus stabilized" Vitamin C this provides a complete diet for koi and other pond fish. Also contains spirulina and other color enhancing ingredients to intensify fish color."