Solar Sun Rings® Plain Blue Swimming Pool Heater Cover - 15 pack

Features:

• Designed to be compatible with automatic pool cleaners and for easy placement and removal by one person.
• Compatible with solar panel systems giving a pool a double shot of the sun's energy during the day and great night time insulation. 
• The magnets for conditioning the water are placed into the perimeter of each ring to facilitate rafting.
• Designed for continuous use without culturing a pool full of mustard algae.
• High quality polished vinyl for the top layer and a 50% density lightly frosted lower layer. 
• Must be stored out of direct sunlight to prevent overheating.