I am happy to have someone give me great advice!
Problem I have is a massive probably 60 or so brown spots on the bottom of my IG pool and some on the steps. I had some old vitamin C tabs so I crushed them and placed it on a brown spot on the step. It didn't change the color.
A Pool guy said it is the iron bleeding up from the rebar. I won't get into what he told me to do!
Then someone else should drain the pool and grind out those spots and then put in the new diamond bright? HELP!
I have other photos also