I have seen ZeoMag on certain sites, I don't mind paying for something but when I know I am getting taken advantage of I can't stand it. Dolomite is mined all around the world, the chemical compositioin does not differ in this rock, so someone must sell it locally or have source. I am going to use this in my reactor. ZeoMag is 20.49 a kg. online and I found certain scientific supply companies that sell laboratory grade dolomite for 12.99 a kg. Does anybody know of any other place that has it? Thanks!