Initially, I placed 75ft of poly tubing into a 4'x4' box (2x4's) made out of Dow blue board and clear / white poly carbonate panels with the inside painted black as shown in the video. This is all connected to an Aquatop 496 GPH submersible pump which has been choked down to about 250 GPH to give the water enough transit time through the pipe to heat up. I found that I did not have enough pipe so I added another 100' to the existing pipe, I am in the process of sealing the box, and I will need to use glass on the front to better trap the heat as the poly panels don't do a good job. I have a resource to buy cheap used windows and will be heading down to look for one soon. I have posted some pics of the unit as well.
Until next time....
