The Sta-Rite PLM series aboveground filter system features an ultra-capacity filter that handles dirt loads up to 15 times greater than sand filters of equivalent size. The PLM Systems flow balanced filter tank in combination with its superior pump efficiency makes this unit a great value. * 100 sq ft. Modular media filter system * Superior dirt loading capability up to 15 times more than sand filters of equivalent size * Virtually maintenance free operation * Get the Smart choice in Above-ground filter systems