Brownish Orange Staining On White Fiberglass Steps

chadly08

Active member
Mar 20, 2021
25
St. Louis, MO
Pool Size
20000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool Universal40
image.jpg
I purchased this house with a pool last fall and the steps have always been stained. The pool store gave me some quarter shaped tablet that seemed to run the stain right off but I never got around to following up on what it was and how I could get my hands on a larger amount. Anyone know how to make these steps sparkle white again?
Thanks!
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
25,663
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
A good guess is the stains are iron. Crush up some vitamin C tablets and put it in a cloth on the steps. If it lightens the stain or clears it then you need to do an AA treatment.


@mguzzy recently did it on his pool.
 

chadly08

Active member
Mar 20, 2021
25
St. Louis, MO
Pool Size
20000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool Universal40
Man this AA treatment seems like a fair amount of water balancing. I hate that I’d have to bring down the FC. The steps where I rubbed vitamin C all over have stayed white. Any chance that filling a filter sock with ascorbic acid and manually scrubbing the stairs would work? Would it be better to buy a bunch of vitamin c, crush it up, and scrub the stairs with that?

I’m guessing the stains must be pretty old. The water can’t be holding much iron as they’ve stayed white where the tablet cleaned them.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
25,663
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
If you just need to do your stairs then spot treating with crushed vitamin C can work.

Chances are you have iron stains on your liner and cannot see it with the liner color. If it’s ok with you then ignore it.
 

chadly08

Active member
Mar 20, 2021
25
St. Louis, MO
Pool Size
20000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool Universal40
Appreciate the response. I’ll give it a try and report back. I’m sure you’re right about the liner. Someone would be hard pressed to be able to tell though.