Aqua Master Growth Fish Food, 11-Pound/Bag, Large Enriched nucelotide enhances koi immunity A well-balanced combination of amino acid, saccharide and fat to provide the essential ingredients to develop a beautiful koi body Coated with Bacillus Subtilis natto to facilitate digestion and reduce water contamination High palatability 4 Bags/Carton; 6.5-6.7 millimeter Enriched nucleotide enhances koi immunity A well-balanced combination of amino acid, saccharide and fat to provide the essential ingredients to develop a beautiful koi body Coated with bacillus subtilis natto to facilitate digestion and reduce water contamination High palatability 4 Bags/carton; 6.5-6.7 millimeter