The following pics are from our 36,000 gallon, freeform gunite pool, running a hayward SWG. there are only deposits under the waterfall from the spa.
Latest numbers (today)
TA 100 (I have been aerating and adding acid to lower, usually running 80-90)
I am increasing the swg chlorinator to bring up chlorine to 6, but noticed these deposits. Any ideas? Also, cleaning suggestions, not worried about stone, but do not want to destroy my tile!