Here are my numbers using the TF test kit:
CYA (never lost site of the black dot)
Salt level 3000
Salt Test Strip indicates 3600
I noticed some small black spots last week and cranked up the cell to 100%. FC level has not budged. Does this mean the black spots are Algea?
The pool looks great except for those very small black spots in a few places. I've tried scrubbing but they don't dimish in size or color.