hey, I just found this site! my pool stays open year round. I let it get out of hand and was needing to get it back under control. The readings were FC 1.1,- TC 8.3,- CC 7.2,- PH 7.2 - TA 90, - CH 333, - CYA 10 - Clear Water, have a few pounds of grandleur shock left before trying the liquid method, need help, do I need to add a lot of chlorine shock at one time or gradually add it, like 2 lbs. a day until I get free Chlorine level to hold. I was getting like a chlorine demand last year and drained pool. don't really want to keep going that route anymore. Thanks in advance for any help you can give me. I'm from South Carolina and it is a older pool.