This quote was taken from a thread in Chemistry 201 but there seemed like multiple (but similar) subject so I am creating a new topic....
bk406,I'm hoping that the HTH metal control i bought will work in a similar way. The active ingredient on the bottle is the same as Jack's, but the formulation could be different.
I am tempted to try precipitating (with chlorine) the iron out of my vinyl pool but your sentence above confuses me. Why do you need the HTH metal control? Doesn't the precipitation of the iron eliminate the problem?