Would turning the spa blowers on be a good idea to help mix the water as well? Just wasn't sure if ok to leave on like that since so old.Wait several hours and brush the pool or swim to fully mix the water. Then retest.
I would err pH on the low side. Much worse to have too low of pH versus too high a pH.
Hi Ejosh87,Ok did another test (5 hours since stopped drain/fill) and showing:
CYA: 50 (hard to tell exactly but 50-60)
So assuming at this point I'll just let FC come down to 4-8 range and then start with Liquid Chlorine daily to keep it in that range.
Thanks so much for everyone's help.