Quote Originally Posted by Poconos View Post
Actually they are about one pound balls of plutonium. They sit on the bottom of the pool and give of lotsa heat. They started to appear in stores years ago as the US and Russian nuclear warheads are being dismantled and used for peaceful purposes.
Al
And this from a Mod!?!?!?!

Why not just let anyone who is having 'hot flashes' soak in the pool? Talk about free energy!

As far as the "Heat Balls" and "Solar Pills", they contain HeatSavr liquid inside, which is a wax that sits on the surface of the water and in a perfect world (NO water movement to disturb the surface!) can keep a degree of two of heat in overnight. When used with a dosing pump the liquid is actually somewhat effective in indoor applications when all circulation is off for the night but for an outdoor pool a solar blanket is much more effective and a lot cheaper in the long run.