Optimum 3 in 1 is a special formulation specifically designed for koi, goldfish & cichlids that promotes growth enhances color & increases immunity. It contains 12 % Spirulina, which rapidly enhances the superior natural color of koi, goldfish & cichlid fish. Additional probiotic supplements help in the digestion of food & absorption of nutrients. Plus beta-glucans supplements to increase disease resistance and improve growth performance in fish.