Well.. I am going to ask an obvious question that it seems no one has thought of.. or maybe I am missing something.
Why buy dead rock manufactured rock and then seed it for the same cost as already live manufactured rock??
http://www.ecoliverock.org/
Not only is it cheap, but all profits go to reef conservation. It is Canadian and shipping is even free and included in the cost. Unless dead rock is waaay cheaper than $2.80/lbs with shipping, there doesn't seem to be a point in using it.