I'm in my 4th (I think) week of dosing. I started out with .1ml/25g, and slowly increased to my current dosage of 1.2 ml/25g. I'm using 80 Proof, 40% Ethanol DISTILLED Vodka. I used it after I already had established rock, and was battling some NO3 that my corals weren't taking a liking to.
The parents understood and I let my Dad read this article: http://reefkeeping.com/issues/2008-08/nftt/index.php
That is by far the best article on the subject. Read it at least 2 times through!