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| Thanks Gerald.
I think most of those grades of phos acid would be the white acid (ortho's) like the kind used in soda. I also remember using a phos based bare metal treatment once to prep the surface for a special primer that DuPont sold.
There was a claim that some of the Fe micronutrient products originated from bed spring factorys during the acid wash treatment process, but IIRC the acid was not phosphorous based.
Edited by Jon S 4/6/2010 06:57
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Liqui-grow fertilizers
