Quick Grow is a food that is very easy to digest and can be distributed at all water temperatures. Koi activity starts when the water temperature is 8°C. Quick Grow is excellent for growth and shape and does not pollute the water. When water temperature reaches approx. 15°C and you want to brighten up the colors of your koi (koi cannot produce red color) we recommend our Bright Color Koi food. Quick Grow can be mixed with Bright Color and Excel Color. It gives excellent results.