How to Build a Easy DIY Solar Pool Heater. All you need is 4 two foot lengths of pvc, 4 90 degree pvc elbows, foam pipe insulation, duct tape, 6 mil black plastic and some wire ties. The project takes less than one hour. This design works great for above and in ground swimming pools. http://www.diyeasycrafts.com/
Let's see: 100' of 1/2" black tubing ($25), easily dismantled pvc pipe frame with wooden or metal hub (high estimate of $25), two large buckets (one source, one shower supply), and a submersible pond pump ($25-45)-- solar shower anyone?