Thanks Evan I am wrinting that name down now. As far as the metals testing in the water, I never have metals, but I get stains. When the metals have fallen out, or are sequestered, the test will not show metals. So, you would have to get it at the perfect time to have the metals show up on the test - unless you test your fill water - that will show metals (if that is where they are coming from). Metals can get in the water in so many ways - If your pool stains, then there is some metal in there that has to be controlled. I'm sorry, I just don't know where your metals are from, and I don't know where my metals come from either If I ever figure it out I will post - and I hope you do the same We can all help each other by posting what works, because every pool is a little different so there are a lot of things to try