Great news!!! New Pentair DE filter works great. Woke up to a sparkling clear pool for the first time since last August. Thanks to this site, I was able to stay with the issues, articulate them well to the PS and have the confidence to push for what was the right thing to do. In the end, thank God, they came through with a replacement.
Great new #2- this morning showed NO water loss, where other mornings showed 2-3 inches of water loss! Why, you ask? Because Jblizzle was able to identified the leak location by reading my posts. The PS and the leak detection company both said that the leak was located in the return lines. We have cracked through the concrete pad, dug two feet down and three feet wide by hand, only to find out, the leak is on the suction side, NOT the return lines. (Jason, I used the correct terminology! )

I have closed the line at the equipment room AND placed a gizmo inside the skimmer to block the water from each diection.
I still need to pinpoint the leak location and do a repair, but I can ask the leak detection company to come out and redo their test, with a more narrow scope of where to look. I feel confident we will be able to fix it. In the meantime, I can stop wasting hundreds of gallons of water a day and the chemical loss that have frustrated me and my pocket book over the last two months. I will just run with one skimmer until its fixed.
This is a milestone in this "perfect storm" pool saga.
Wrong type and size filter + leak + algae plagued spring startup + powdering paint job = 40,000 gallons of cloudy water.
P.S. As another move motivated by this feasco, I have contacted the "15 year guanteed" paint manufacturer and they have agreed to refund my $2,000+ paint purchase, after three failed attempts to repaint the pool in 7 seven years! That's another thread!
Thank you, Jason and TFP for all the threads, pool school and the encouragement to do my own testing and use the pool calculator.
