Hello, potential first time pool owner here
A pool at the house I'm looking at has a few brown spots at the deep end of the pool near the bottom. The biggest is about baseball size. Goggling mostly points to rebar rust, and I just learnt it might just be a surface stain "dirt scale"?...
I took some photos so what to get some expert opinion here:
If it is rebar rusting thru..how much am I looking at?
If it is just surface stain, what do i use to get rid of it? Thanks in advance!