Ok - the filter has been running since about 6 last night. There is no visible different, but we did pull out a TON of brown sludge this morning so it is removing metals. Just not enough to be noticeable yet. I also ordered a sand filter to replace the lousy filter that came with the pool.

I know the previous person that tried this put bleach in the pool. Can anyone shed any light on this? But for the metal our water is balanced and our levels are good so I am hesitant to add any more chemicals that might upset that.