Tetra® Goldfish Flakes are a nutritionally complete daily diet for all goldfish and small koi. Ideal for use in aquariums and outdoors in small ponds too. This scientifically developed mix of highly nutritious ingredients plus vitamins minerals and trace elements will enhance your fish’s naturally brilliant colors. Includes patented health-enhancing ProCare formula to help support your fish’s immune system for optimal health and long life. This precise blend of immunostimulants vitamins biotin and omega-3 fatty acids is custom designed to strengthen a fish’s resistance to disease and stress. Feed your goldfish 2 to 3 times daily only as much as your fish can consume within several minutes. Tetra brand’s flake food formulations have been designed to be easily digested by fish and not to leach color helping to keep aquarium water clean and clear when used as directed.