This superb 38% protein formula promotes health, growth, and color enhancement in all fish from competition Koi to Goldfish. It contains the exact amount of Spirulina that helps act as an immune stimulant, and also as a color enhancer. It increases your fish’s slime coat and strengthens your fish’s cells to help them fight off stress related, and other diseases. It also intensifies your fish’s reds and blacks while maintaining brilliant whites. All of our foods contain natural amino acids and specially formulated digestive enzymes, which enable your fish to digest our food more completely, Feeding ULTRACLEAR Growth & Color food helps to promote good water quality.