Floating, Medium Sized Pellets 4.8mm Fortified with Probiotics including Bacillus subtilis & Aspergillus oryzae to maximize digestion while minimizing waste 60% High Quality Menhaden Fish, Shrimp and Wheat Meal Helps Digestion and Maximizes Uptake of Nutrients Champion and Show Grade Koi and Goldfish Food Blackwater Gold-N Professional Diet Premium Koi & Goldfish Diet combines ingredients with many micro-nutrients and vitamins as well as other ingredients to help digestion and maximum uptake of nutrients. This is a favorite of those keeping champion and show-grade fish. It is used by professionals worldwide. You can also grind to feed small fish for fast growth and good body shape. This diet is fortified with probiotics including Bacillus subtilis and Aspergillus oryzae in sufficient quantities to maximize digestion while minimizing waste output. Blackwater Gold-N Professional Diet Premium Koi & Goldfish Diet contains ANI-b. ANI-b was researched and developed through collaboration between Aquatic Nutrition Inc., Blackwater Creek Koi Farms Inc. and a select group of experts from many areas of the world. ANI-b maximizes nutrient uptake while increasing disease resistance and promoting faster healing. Your fish go through many stressors throughout the seasons including fluctuating water temperatures, stressful spawning events, handling and transportation. *2lb and 8.8lb bags are black and the 40lb bags are the standard Blackwater Premium Koi and Goldfish Food bags