I was only joking about the Pima...it was a way to get some of the maintance costs back.
The pvc arangement I was talking about is a DIY solar water heater. The tank water runs through it..back and forth as many times as you can manage. (understand this WILL increase the load on your pumps and cause higher power bills but less so than an electric spa heater.) the waters heated during the day by direct radiation. It takes that much water a LONG time to heat up or cool off so theres an OUTSIDE chance this could work as long as you don't live in the frozen north.
The pvc arangement I was talking about is a DIY solar water heater. The tank water runs through it..back and forth as many times as you can manage. (understand this WILL increase the load on your pumps and cause higher power bills but less so than an electric spa heater.) the waters heated during the day by direct radiation. It takes that much water a LONG time to heat up or cool off so theres an OUTSIDE chance this could work as long as you don't live in the frozen north.