Blue Ridge Platinum Pro is a professional, fish meal-based diet formulated for discerning koi keepers that want the very best for their fish. This is a higher protein formula that will provide your koi with exceptional growth, nutrition and coloration. Platinum Pro contains everything needed to keep your koi in top show condition, including top quality protein, carbohydrates and amino acids. It contains proven color enhancers Spirulina and Canthaxanthin for superior color enhancement. Also includes Primilac, a probiotic immune stimulant designed to protect koi from sickness and disease. Large pellets are 3/16 in diameter. The 4.5 pound and 14 pound sizes come with resealable lids.