. . . membership upgraded.

I have some of Poconos' pictures somewhere. If you really need to see them, and ask AFTER July 4th, I'll see if I can find them. But he built that system when the available plastic solar systems weren't that common. You might want to look at the roll-out solar matts that are available now, and do what Al did, but somewhat more efficiently.

Here's an example:
Fafco Solar Bear System for AG Pools @ Amazon