I am looking for a commercial brand named pH down product that is approved for agricultural use, that is sulfuric acid based, not phosphoric or nitric acid. I can't just use battery acid or non-ag approved products where I am.
I remember General Hydro had a powdered sulfuric acid pH down years ago, but I can't find it anymore.
I remember General Hydro had a powdered sulfuric acid pH down years ago, but I can't find it anymore.