Now would be a very good time to clean them, you can remove the stains without putting the iron back into the pool
Ascorbic acid or citric acid will remove the iron. I've also used lemons on small areas successfully. This will take a bit of elbow grease and would be time and energy wasted if you don't use a sequestrant HERE
is a link to the Pool School article on stains.
Hope you have a great pool season with
sparkly white stairs