We are opening the pool this week - I've tested the water, and generally things look good, but my pH is 8.2+. I'm supposed I get that in range before I add chlorine, yeah? And don't need to slam on first opening, as long as there's no algae?
Adjust your PH. As long as your water is clear with no visible sign of algae, your CC is 1 or less, and you pass an OCLT on startup, you're good to go. Then make sure your FC matches your CYA requirements. Adjust as necessary.