Work as multipurpose chemical filter media that removes toxic compounds and medications Performs up to 3X more efficiently than other activated carbon Acid Free. 100% natural walnut shell carbon will not raise phosphate levels Works longer comparing to average activated carbon Premier Activated Carbon is safe for both freshwater, saltwater, and pond environments. Removes odors, discoloration, and impurities to keep water crystal clear Packed inside reusable mesh bags in 5 pound increments. The 50 pounds bulk is in one bulk case (not in mesh bags). Always use carbon in mesh bags to prevent clogging filtration systems Preparation: Always rinse carbon filter media until water runs clear before use to remove excess carbon dust. Each pellet size may vary slightly due to the nature of the product. ***Warning: Not for human consumption. This is for use with aquariums and ponds only. Premier virgin activated carbon in bulk pack. It helps remove odor, colors, waste from your tank and keep water crystal clear. Please note: Always rinse carbon filter media until water runs clear before use to remove excess carbon dust. Each pellet size may vary slightly due to the nature of the product.