Floating Solar Cover
Solar Pill Solar Pill (4-Pack)
Liquid solar blanket Solar Pill keeps swimming pool water warm. A convenient alternative to standard floating pool solar blankets.
Merchant: In The Swim
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