We all know that heating a home takes quite a fair bit of energy, and all of these will add up at the end of the day. The Solar Powered Pool Heating Rings help raise the temperature within an average sized swimming pool by up to 3 to 4 degrees F in a week. They remain where they are, courtesy of magnet clasps that also helps prevent water evaporation during the day. I suppose if you're rich enough to afford a swimming pool in your home, surely the traditional heating method won't be too much of a burden on your monthly expenses? Oh yeah, I forgot - you are probably one of those tree hugging folks who drive a Prius and do not wear fur. The Solar Powered Pool Heating Rings can be picked up for $69.95 a set.