I'm a new pool owner of about 3 months in NE FL. I have a roughly 13k pool/spa with blue speckled marcite and a screen enclosure. I've done the test kit and I always have greater than 100 CYA and I've been keeping my stats as follows : FC 8, CC 0, TA 100, PH 8.0 (I struggle to keep PH low) and...