Marineland C-360 Canister Filter Foam Rite-Size T - 6 Pads Total(3 Packs with 2 per Pack) 6 Pads Total(3 Packs with 2 per Pack) Marineland C-360 Canister Filter Foam Rite-Size T Screen Out Dirt and Debris Fits PC 360 Filter foam may be rinsed and reused once every three weeks for a total of nine weeks.