Pool Heating Rings
The Solar Pool Heating Rings.
These are the floating rings that harness the power of sunlight to raise the temperature of an average-sized pool by 3° - 4° F per week.
Merchant: Hammacher Schlemmer
Solar Sun Rings Solar Sun Rings
The Solar Sun Ringā?¢ is a passive solar swimming pool heating device made from two sheets of heavyweight U.V. resistant vinyl.
Merchant: In The Swim