The AquaClear Quick Filter
accessory turns AquaClear Powerheads into powerful filters for rapid removal of most particulate debris. The Large Quick Filter is ideal when providing additional circulation to protect fish and invertebrates. The extra-large central core contains an ample supply of granular filter material, such as carbon, for specialized jobs like removing liquefied waste or polishing aquarium water. Hook two or more Quick Filters together to expand filtering capacity or for deeper aquariums. The AquaClear Quick Filter fits all AquaClear Powerheads.