Marineland Canister Filter C-530 Polishing Filter Pads, Rite-Size X BULK SIX PACK BULK PACKAGING: For this version we remove the Pads from the bulky packaging and pass on the shipping savings with a lower product price Rite-Size X Replacement Polishing Filter Pads for Marineland C-Series C-530 Canister Filters Replace every three weeks. Do not clean with soaps or abrasives. Each of the THREE PACKS contain two pads (6 pads total)