Someone suggested that I should do more of the "mini drains" by draining to waste until it gets to skimmer level and then refilling so that the Texas sun won't hit the plaster. I'm assuming the down side, even if I do a bunch in quick succession, is that it'll waste more water. Would you just try to do a quick 50% drain/refill or mini drains/refills? Minis I feel confident I could do on my own and could start, I mean ...right now really.Your fill water calcium level is lower than I expected. That's great news. When the time comes, exchange between 50 to 60% of the pool volume.
Following TFP recommendations, it's nearly impossible to properly manage a pool with a CYA level of 160. Target FC level is 18 ppm and minimum is 12 ppm. PH test results are not valid with FC levels above 10 ppm.
For now, keep managing the pool the best you can,, and we'll help you get set up after your water exchange.