I am opening my pool and began the big "Slam" session today. My CYA was 30 & PH was 7.3, so I added the amount of bleach required to reach shock level. Then I tested the FC level after 30 minutes and it had not changed. So, I waited another 30 minutes, and again, the FC level had not dropped. After another 2 hours, the FC level dropped a tiny bit, but I wouldn't say even a full point.
Last year was my first time to maintain my pool this way, but I remember it took several incremental additions of bleach before the FC level began maintaining for any length of time. So, I expected a substantial drop when I tested it. Since I have never dealt with this, I'm just wondering if there is something I do not know/understand. Or, if this is not something out of the ordinary, how do I proceed? Do I just keep testing it every 30 minutes, & when I finally see a drop, add the appropriate amount of bleach to get the FC back to shock level?
Thank you! Not sure what I would do without all of the info I get from you guys!