I'm looking into buying a pound of Iron Chelate from www.litemanu.com but what is holding me back is trying to figure out the dosing. How much of the dry would I need to add to say 500 ml of water to get something I could use?? Say a mix that would raise 10 gallons of water to 0.1 ppm for 1 ml or so?? Any help with this? Semper Fi