COMPREHENSIVE FORMULA: Can be used as fish tank food (cichlid pellets, tetra fish food), live shrimp food, food for live snails, crayfish, crabs, turtles, axolotl, and more live aquarium animals. QUALITY INGREDIENTS: Made from vegetable matter and spirulina algae. Provides optimum nutrition and consists of over 35 percent protein. Used in all of the holding tanks at the Aquatic Arts headquarters. BULK SUPPLY: Enough food to feed 10-15 shrimp, 1-2 crayfish, or 10-15 snails for over a year. Comes in an 8 oz resealable feed container for long or short term storage. OPTIMUM NUTRITION: Encourages faster growth and breeding. Fortified with calcium for healthy exoskeleton growth. IMPORTANT: Contains TRACE AMOUNTS of copper sulfate because copper sulfate is VITAL for blood cell production in invertebrates. This product has been used successfully by thousands of customers over five years, and by Aquatic Arts in our own holding tanks. It will NOT harm your inverts.