brown spot on bottom of pool w/pics


New member
Jul 2, 2012
Hello, potential first time pool owner here :cool:
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 much am I looking at?
If it is just surface stain, what do i use to get rid of it? Thanks in advance!

zoomed in

another spot


Mod Squad
LifeTime Supporter
TFP Expert
Jul 10, 2009
Houston, Texas
It's hard to tell just by looking what type of stain it is. That last picture looks like it has a raised edge. Some stains can be taken care of with raised chlorine levels and brushing, but the stain will need to be tested to find the cause and figure out a solution.
If you can find out some of the pool's maintainence history and current test results that would help.