The Bestway 5678L Sand Filter Pump will keep crystal clear and clean water flowing through your above ground pool. This powerful pump lasts longer, is more environmentally friendly and requires less maintenance than a traditional filter cartridge pump. Combined with silica sand or Bestway Polysphere Pool Filtration Balls (sold separately) this pump will filter debris out of your pool water and the included pre-filter strainer will catch larger items, increasing efficiency and longevity. The ChemConnect dispenser provides a stable level of chlorine to your pool to maintain proper chemical balance whilst staying low maintenance.