Fluval ProVac Filter Pads are replacement fine filter pads for the Fluval ProVac Electric Gravel Cleaner. These pads install into the ProVac unit to capture the tiniest particles and debris siphoned out of your substrate, preventing cloudiness when cleaning. By regularly replacing the disposable ProVac pads, you ensure maximum dirt-trapping ability and crystal-clear results every time you vacuum your aquarium gravel.