Hi Carl,
It's closing time here in Nebraska, unfortunately. Our temps have been in the 60's to low 70's, and in 40's to 50's at night. Tomorrow our high is in the 50's and low of 35 with patchy frost. After that it's supposed to get back up into the mid 70's after a couple days, but night's still in the 40's.

Yesterday my pH was at 7.2 - it stays there consistently and with our iron (well water), I have good luck keeping it there. For closing I was gonna raise it a tad as this year it was a tad low when I opened. Last night I added between 1/4 and 1/2 cup 20 mule team borax to raise it. I forgot to check it today before I added my polyquat60 for closing. I added 2 qts, read that somewhere when I first got our pool. When I checked my pH now it's purple... really high! Could the polyquat that I put in about 4 hours ago tamper with my testing?? Or could that little of borax raised it that much? I diluted it and put it through the skimmer. I have muratic acid I could lower it with if needed.

I have an 18x34 AG, 3620 DE Filter, .5hp Northstar hayward high efficiency pump - run system 24/7 as I don't see any increase in our monthly bill. My levels are:
TC - 12
pH - ??
Alk - 150-160 vinyl liner, ok under 180
CYA - 35
Temp - 73 brrrrrrrr I have to go take steps out in a few minutes!!!!!! Just took my solar blanket off today and turned my solar panels off, so it should drop in temp pretty quickly.

Would appreciate your opinion, probably gonna put my winter cover on tonight as we are harvesting here now and getting help is like pulling teeth this time of the year, and have volunteers for tonight. I'm gonna leave my pump running at least tonight yet. Thanks!