Quote Originally Posted by mbar View Post
I am not a chemist like chemgeek.
Just for the record...I'm not a chemist either, don't have a PhD in chemistry, don't work in the industry, etc. I did major in physics & chemistry at Cal Berkeley (field major in physical sciences since they didn't allow a double major in those two due to too many overlapping courses, mostly in math). I rekindled my interest in chemistry when I got my pool 7 years ago and ran into problems when using Trichlor tab/pucks. Did some chemical research and found The PoolForum.

I totally agree with Marie that if the water is clear and there is no staining, then don't worry about the varying metal measurements -- at least one of them is wrong. The 5 ppm sounds suspiciously high, even if sequestered.

Richard