BOS Aqua Leisure 2,150 GPH Filter Pump Aqua Leisure Model SA-3768 fits all Aqua Leisure above ground pools and all pools with 1.25" hose Ideal for Aqua Leisure Simple Set and similar 18 ft diameter pools Clear housing allows for quick filter check Pump includes two filter connection hoses and one ready to use filter cartridge Uses the Aqua Leisure Size 2 Filter Cartridges (Aqua Leisure Model SA-3799)