Kenzen Koi Food Breeders Choice 4mm for smaller Koi fish all year and winter - 10 lb. Bag Natural Ingredients FDA approved easy to digest Over 80% decrease in waste - Can be fed year round Successfully tested feeding Koi in water at 38 degrees Fahrenheit For small Koi and can be fed to large ones as well Small Floating Pellets - Highly Digestible and High Protein