Brand NEW Lot of 2, Size: 9 OZ / 255g each AquaTech activated Carbon works with all aquarium filters to remove odor, discoloration, impurities and toxins from water on contact. This activated carbon for filter has thousands of tiny holes throughout its structure to capture varying sizes and types of molecules. This activated carbon for water is more effective than regular charcoal and produces crystal clear water. AquaTech Carbon works in virtually all aquarium filters. Produces crystal clear water • Removes odor and discoloration Removes impurities and toxins from water ● Features thousands of tiny holes Captures varying sizes and types of molecules Works in all aquariums ● Instructions: 1. Place Carbon In Media Container Or Mesh Bag. 2. Rinse With Tap Water to Remove Dust.3. Place Media Container In Filter. 4. Replace Carbon Every 2-4 Weeks. Activated carbon is also useful for home cleaning and deodorization, plus many other applications around the house. Aqua-Tech Activated Carbon Aquarium Filter Water Cleaner: Keep your aquarium looking fresh 9 oz of aquatic cleaner per package Packaged in the USA