First off, respect and credit to Make Zine and Cogzoid for
sparking this idea. I modified their designs and instructions to
make the project cheaper and more cost efficient.  Summer is
upon us and that means it's time to open the pool. However, I
don't have a pool heater, or the desire to spend thousands of
dollars on one. After surfing the net I found a solution I
liked: the so called lily pad passive pool heaters, and made it
better!  Why Lily Pads?   • They heat- by attracting and keeping
more solar energy in the water   • They slow evaporation- by
forming a barrier between the air and the water   • They are
easy to use and store- just push them aside or stack them on the
deck   • They're safe- no solar blanket to get tangled in or
caught under   • They're cheap- ten for $35 (Pro versions will
run you $25 each!)   • They're green- they use no gas
or electricity to heat, conserve water, and can last several
seasons  We'll be making ten 4.77' (about 4' 9.25") lily pads.
That's a combined surface area just sh