Ok so I've met all 3 criteria but my pH is a bit high at 8.2. My FC held overnight at 16 and I'm going to let it drift down to normal today, shouldn't take too long since the pool is in full sun. We're having a party this afternoon and I'd like to be able to swim as it's going to be 90°+ here today. Is this pH reading valid? Do I need to add something to bring it back down?