Danner 12202 Carbon and Coarse Pad Replacement Filter Highest quality materials used to make high-end aquatic supplies Provide the best environment for your aquatic life with Danner products 100% designed and made in the USA with quality goods Replacement filter Carefully designed to maintain the effectiveness of the original filter The coarse pad offers biological filtration, the carbon impregnated media offers chemical and biological filtration, and both offer mechanical filtration Filtration helps support plant and fish life For PM 1000 and PM 2000 Carbon and coarse filter media Foam Large pads ,2 per pack