Mbar, the resident metals/stain expert, recommends that you do not shock the pool, but rather raise the chlorine levels slowly, watching to make sure that you don't start get staining. In your case I think I would just keep the filter going, consider adding some plolyquat, and then start slowly raising your chlorine and see if you can get it up to shock level without staining. I'll see if I can get her to take a look at your thread and see if she can offer any suggestions....in the meantime, try reading through her posts in the "metals" forum.

Janet