Check the listing for details. AQUANEAT® Replacement Canister Filter Pads Compatible to Cascade 1200/1500 Foam. Condition: New. Listed at 18.99 USD. Features: Generic pads for Cascade 1200/1500 CCF4UL/CCF5UL replacement canister filter sponges. 4pcs sponge bio filter pads (1xCoarse, 2xMedium, 1xFine): Bio sponge optimizes the colonization of beneficial aerobic bacteria keeping the aquarium healthy. (Reusable after rinsed) 12pcs of white floss pads: Filter out fine particles providing crystal clear water. Provide both mechanical and biological filtration. These filter pads are not the original products but of high quality. INCLUDES: 1 pc coarse (Blue) 2 pcs medium (Green) 1 pc fine (Black) 12 pcs floss filter pads (White) Tips for Usage and Maintenance: · Maintenance of Sponges: The sponge will need to be rinsed every time it becomes dirty, about once every 1 to 4 weeks. It’s helpful to reserve the beneficial bacteria by washing the sponge gently with water from the fish tank instead of tap water. After 6 to 12 months’ usage, the micro holes of sponge are gradually clogged by the tiny debris. So it is also recommended to replace the sponge once 6 to 12 months or when the sponge gets worn out.