I was optimistic things would go well in opening my pool this year. I am in the shock process and I have been brushing the sides of the pool. There is some very bad whitish scaling all down the walls of the pool (bad enough to cause scratches and scrapes on swimmers). Scrubbing with a vinyl brush does next to nothing.
I have never had this problem before. How can I get rid of it? How can I prevent it from happening again? Please help.