Rings of nutrition lead to happy and healthy fish with TetraMin Tropical Crisps. Each crisp contains an outer ring of essential nutrition, and an inner colored spot of three specific concentrated nutritional areas. The green spot contains concentrated spirulina algae and easy-to-digest protein, vitamins, and carbohydrates. The red spot works on your fish's color with high levels of carotenoids. The orange spot is high protein krill that will stimulate muscle and overall growth of your fish. These three combine to create one of the most nutritionally balanced flake foods on the market!