Don't forget about the manganese in GH Booster as well. If this is an experiment you're looking forward to conducting, go for it. But if you're looking for a few ounces, lemme know. First class weight limit is 13oz for $3.50 or so. I have a bunch of CaSO4 that I have no current use for, so I don't mind getting rid of some of it. PM me if you want a few ounces.