750 Watt Perfect Climate Deluxe Pond Heater/De-Icer (with removable floater ring and 12 ft cord) by K Manufacturing. $56.20. Floating or submersible in one convenient de-icer. Available in 3 wattages, refer to our convenient zone chart for the proper choice. Safe in all ponds and will not harm pond liners. Easy to maintain and clean. 12 ft cord. 2 year warranty.
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/