Re: Jim C. would probably be able to give you advice as to sources and amounts to use Actually, I cannot as I do not use them & have never considered them. I don't put sand in my powders :-) The only suggestions I'd have for anti- caking would be to slightly increase the size of the grind, change the type of grinder, or vary the moisture content. -Jim C Mild to Wild(R) -- Open WebMail Project (http://openwebmail.org)