Edit: I've changed the review be ause in the meantime my query was answered and I can now work with it. Original review: Before buying I've sent a support request because I already make colloidal silver and wanted to know if this makes colloidal gold, copper and zinc. By checking amazon reviews, I saw the answer "yes" and, even though they never answered to my query I've decided to give it a try also because it says there are instructions. The instructions are only for colloidal silver and when requesting for information on how to use their generator for gold, copper and zinc (which I bought from them) they were completely silent, sent another email and silence again. So I cannot, by any means, recommend this company. They have 2 stars only because the material was delivered. Now I just need to find out what to do with it, I am happy with the way I make colloidal silver so... I have no use for this. Disappointed.