Good afternoon Good Folks!!
Old member here, and thanks to the good folks here my pool has been doing pretty good.
On and off (mostly on), I've been having what seems to be more and more spots of algae in my pool. They're black, about the size of a pencil eraser, come off with a little scrubbing, seem to prefer steps and sun decking, but seemed to be like the bottom in the shallow end lately.
I had run out of the powder to measure my chlorine acurately, but the blue kit showed me at 2+ all summer... got me some new powder this week and here's my numbers as of yesterday:
Thanks in advance for your help!!
Borates 30 (probably has been higher, but good bit of rain lately)