What effect does each 3" tablet have on CYA level and FC level in a 11,500 concrete pool? I cannot work it out from Pool Math. I wanted to put in a couple of tablets while I am away for the weekend. My CYA level is 40 so I think I can do this without a problem. Just not sure and effect on FC as I am putting in about 36oz a day of 5.25% bleach to maintain my FC at the high end (7).