Aquatic Foods & Blackworm Co. Medium-Large Extra Thick Calcium Feeder Shells for Shrimp, Snails, Crayfish, Crabs and Tropicals Our Calcium Feeders are sifted and graded to remove most dust and chipsDescription:Calcium Feeders are perfect for keeping your Shrimp, Snails, Crabs, Crayfish healthy while providing their needed Calcium. Choose from a variety of sizes. Each Feeder contains Calcium, Krill and Spirulina. Specially formulated with color enhancers to bring out the vibrant colors in your Crustaceans. Fortified with essential vitamins and minerals for overall health and longevity. Will not cloud water. Available in a variety of sizes and styles.Ingredients:Calcium sulfate, Fish Meal, Wheat starch, Wheat gluten, magnesium sulfate, Brewer's dried yeast, krill, Spirulina, l-ascorbyl-2-polyphosphate (source of vitamin c), vitamin a acetate, choline chloride, a-tocopheryl acetate (source of vitamin e), niacin, d-calcium pantothenate, riboflavin, thiamin, biotin, pyridoxine hydrochloride, folic acid, d-activated animal sterol (source of vitamin d3), vitamin b12 supplement, zinc proteinate, manganese proteinate, iron proteinate, ethoxyquin (preservative).Guaranteed Analysis:Crude Protein (Min) 22.0%Crude Fat (Min) 0.01%Crude Fiber (Max) 0.01%Moisture (Max) 11.0%