Ok, so my pool is about 10 months old. About a month ago I noticed a small rust spot on the wall above my deep end swim out, just about 12 inches below the water line. I've called the builder and he's supposed to get out here but hasn't made it yet....Imagine that(being peak build time of year)!!! I tried to scrub it with a nylon brush to no avail. Does anyone know of any remidies? BTW my water does not have high levels of metals in it so I really don't know why this showed up.
As a side note I also just noticed about an hour ago we have a stain from a hair clip on the bottom of the deep end. What should I use?