Swimline Deluxe 21' x 41' Oval Above Ground Winter Pool Cover, 4' Overlap | PCO82545 Pop-Up Tools PHOSfree® works directly in the

PHOSfree® works directly in the filter to capture and eliminate phosphates without clouding the water

Constructed from durable thermoplastic for long-lasting use

and reduces strain on the spa pump and heater

Ideal for pools up to ~50

and press firmly to bond evenly

Swimline Deluxe 21' x 41' Oval Above Ground Winter Pool Cover, 4' Overlap | PCO82545 Pop-Up Tools PHOSfree® works directly in theSwimline Deluxe Winter Pool Cover 21 ft x 41 ft Oval Above Ground (PCO82545) The Swimline PCO82545 is a heavy duty solid winter cover designed to protect a 21' x 41' oval above ground pool through the off season. Its durable woven polyethylene construction helps keep leaves, dirt, and winter debris out of the water while limiting sunlight exposure for an easier spring opening. Key Features Fits: 21' x 41' oval above ground pools Solid winter cover