AquaClear Quick Filter Powerhead Replacement Cartridge AquaClear Online Price $6.27Regular Price $8.97 Default - $6.27 Quantity This product is currently sold out. The AquaClear Quick Filter cartridge has an extra thick duo-density pad that has an expanded capacity to remove solid wastes. It can remove even the smallest particles without difficulty. The cartridge is exclusively designed to fit the AquaClear Quick Filter Powerhead Attachment. 2-pack.