Swimline Super Deluxe 15' Round Above Ground Winter Pool Cover, 4' Overlap, Silver/Black | PCO1419 Sanitizer Cartridges & Cells Note: If water hardness level

Note: If water hardness level in existing pool water is above 400ppm (parts per million)

4 Exciting light shows

High speed switchless

In addition

For heavy phosphate loads

Swimline Super Deluxe 15' Round Above Ground Winter Pool Cover, 4' Overlap, Silver/Black | PCO1419 Sanitizer Cartridges & Cells Note: If water hardness levelThe Polarshield Pro Strength Pool Cover series is made of extra strong polyethylene sheeting woven with thick polyethylene stitching, which provides superior strength and durability. The winter cover is treated to provide maximum resistance to damaging ultraviolet rays to inhibit deterioration and increase longevity. Adding a Pro Strength winter pool cover will protect your pool from the harsher elements of winter and keeps debris, algae and bacteria