Give your fish the nutritious power of spirulina with the Zoo Med Spirulina 20 Fish Food. Made with 20% Spirulina， these flakes are high in protein， vitamins B12， C and E， trace minerals， and natural beta carotenes that bring out the color in fish. Spirulina has also been shown to offer a host of health benefits for freshwater and marine fish， including more energy， better egg production， and even improved appetite. It’s perfect for goldfish， African cichlids， guppies， tangs， and even crustaceans and invertebrates. Simply feed daily as usual by sprinkling onto the water for your fish to snap up. Plus， it’s made in the USA with no artificial colors or preservatives.