Hi,
I have recently fought back some algea and now my pool has some new rust-like stains. The pool also has some stains from metal coins that the kids from the neighbor throw in that we were not aware until cleaning the pool. I went to a local pool supply store and the owner insisted that he's tried many products but the only one that works for stain removing is Lo-Chlor Multi Stain remover.

http://www.lochlor.com/multi-stain_remover.html

Well, it did not do anything except for making my water from crystal clear to cloudy. I've read the forum and people here recommended vitamin c for stain removing but some where I read that this stuff is only for vinyl and fiberglass pools?

Anyone tried this with their plaster/concrete pool?

Thanks.