I have a fiberglass pool, and I can wipe my finger across the walls and get a slight white residue on my fingers.
The day that I brush the walls, my pool is slightly cloudy the remainder of the day, but crystal clear all other days.
8/23 - 0745
8/24 - 0800 (the day of brushing, but before it was brushed)
TA 80 (I added baking soda yesterday afternoon)
I checked the CH AFTER brushing, vacuuming and cleaning the filter and I got 275, twice.
Is this just the calcium depositing on the walls, and is it any issue to worry about?