Thanks - I missed the link on my first pass on that site to where they show the 2 sets on Panels - http://www.powermat.com/PG5ht.html - that explains a lot -- thanks. The installation should go alot smoother - ( I tool the before pictures.)

Also -- I opened the pool today -- crystal clear and all the numbers are in check! - but only 54 degrees. This forum closing instructions made it work without any problems.

Now hopefully soon I'll have the solar panels to raise the temp.