Tideline Bonded Filter Pads offer superior filtration in a bulk roll made from long-lasting coarse material. The pad is easy to cut and allows you to create custom-sized pads to suit a variety of water filtration applications, including large aquariums, ponds and pools. - Bulk bonded filter pad roll suits a variety of applications - Cut to fit your aquarium, pond or pool's filtration system - Bonded pads double the filtration for clearer water. Approximately 3/4" thick. 18-in x 90-ft.