HQRP 4-Pack Blue Media Filter Pad/Canister Filter for Eheim Classic 2217/600 Replacement Coaster HQRP&reg; 4-Pack Fine Media Filter plus HQRP&reg; Coaster; Reusable several times over. To clean just rinse and squeeze out; For fresh and sea water; 100% Compatible with Original filter; 2 weeks DOA replacement warranty!