Not sure what has happened. Just bought the house 2 months ago with a pool. It did not have the white areas or black dots before. At least none that I noticed. Water was not as clear as it is now. Seems like the more I do to care for the pool, the worse it is. The black dots will not scrape or brush off, nor will the white areas. Its like its part of the plaster. Black dots, which are really small seem to be getting worse. See pictures attached. Water is crystal clear and here are the lates test done with the K2006 kit. Water temp is 62 today.
FC - 3.8
CC - 0.0
Ph - 7.6
TA - 75
CYA - 55
CH - 290
Salt - 3300
FC - 3.8
CC - 0.0
Ph - 7.6
TA - 75
CYA - 55
CH - 290
Salt - 3300