Success is whats happened. After shocking with a myriad of bottles of chlorox and keeping cl above 20 for several days, I let it drift down slowly and now have had stable levels in the 5-7 range by adding a gallon about every other day or every third. Ph started drifting up a bit last few days so added a little acid. Looks great, no sign of anything wrong.
Starting to cool into the 60s here at night so kids are not as eager to swim with cooler water temp. Don't really want to consider a cover as I have an oddly shaped pool.