Quote Originally Posted by waterbear View Post
Ben,
Unless the MSDS I have from natural Chemistry and the correspondence from them is wrong, Metal Free is basically EDTA
I don't have Natural Chemistry MSDS sheets, for the most part; would you mind sending me copies of the ones you have, so I can add them to the SwimmingPoolResearch files?

Once I publish all that, we'll have better info on most of the pool chemicals, than the 'support staff' do!