Klir Fleece Filter Di-7 V2Replaces 7 Inch Filter Socks The patent pending Klir Fleece Filter Di 7 fits directly into most seven inch filter sock chambers that automatically unroll new material as it gets clogged, removing suspended particles from an aquarium and producing crystal clear water. The easy to mount, magnetic water sensor detects when the fleece is dirty and automatically advances a new clean section, offering months of maintenance free filtration. The Klir filter