Ah Texas! Close to hitting the record in 100+ days and wondering if this is affecting my PH. Our pool was replastered in March, so I know it's still technically "curing" and was wondering if the combination of a gazillion 100+ days + curing would account for the drift. The last several weeks I have been adding MA almost daily to keep it in the 7.5-7.2 range. Just rechecked my TA and it's at 50. At the moment my FC is about a 1, but I will be adding my daily bottle of bleach after the sun gets off the pool. It does get full sun all day until about 6:30 in the evening and I am pretty sure adding daily is par for the course with the intense heat and sun. Have not checked CYA this week, but as of 2 weeks ago it was at 60 I think...I remember it was within range.
Input on the Ph drift?