Well my pool has been in operation for right around 45 days, and I noticed the pressure of the returns was much less than in the past. I also noticed the pump 'filter window' had a lot of bubbles in it, like at startup.
I took the top off the filter housing and it was filthy, from some fence / sawdust debris and other stuff. Sprayed it down with garden hose and put it back together and everything is running great now, pressure back to normal.
I am going to winterize maybe next weekend. Drain down 1-2" below skimmer intake. Blow out the lines (I bought a Cyclone),, I bought the plastic/rubbery skimmer intake covers, plus I have the gizmos I plan on using some teflon on.
Just wanted to say this site has been helpful, but i never did get the water right. Clear and seems clean, I couldn't get my PH down nor maintain the FC. I plan on throwing in some polyquat when I winterize, using a solid cover, hopefully I don't get any winter damage.