I had an inground pool installed about 3 years ago.
The stairs have since developed these rust like specs on them, it was there following the first opening after my first winter. I've also had these yellow stains develop on my stairs as well as the jets (you can't see it in the picture), I know that magic erasers are normally recomemnded but I find they became so much less effective underwater compared to above the water line and it isn't doing much, especially due to the way the stairs are designed with grooves so you don't slip, it tears apart the strongest magic eraser available in just a few minutes.
I would really apprecate some advice to finally solve this and to get my stairs back nice and white. Someone had told me that the rust on the stairs is probably due to the builder trying to ge rid of glue on the stairs when it was first built and it caused the rust to occur.
Thanks[attachment=0:2jfjfeyk]rust on stairs.JPG[/attachment:2jfjfeyk]