Today I checked to see if the metal magic did anything. I did see some sediment on the bottom of the pool. The ph was low - I guess that's why metal magic wants the ph to be at 7.5 before you use it. I started at about 7.5 - 7.6, and today it was about 7.1 - I had slight staining in two spots before I put the metal magic in, and they were still there after 24 hours. I do have some ascorbic acid, and since we are having bad weather, I may use it to see if the metal magic will turn the metals that are lifted into the metal salts. My chlorine is at 10ppms, so I won't use any until it comes down - it will just waste it. I do have to say that since I had a lot of new water in the pool, and took my chlorine up to 12, I didn't get anymore stains - so at least the metal magic did work in sequestering, and maybe chelating the metals (the sediment). Jakebear, I live in PA too, so I figure now is the time to experiment with these products , while the weather is bad- I don't have much in staining though. The water is crystal clear, I'll see if it clouds after the ascorbic acid is used. I'll keep you all informed.