From an alternate viewpoint, I would never use dry rock myself. I've bought over 500 pounds of live rock, and only once got a worm I had to get rid of. I removed the rock and put it in the garden.
The diversity of life that comes on live rock is to me, one of the best reasons to use it. The brittle stars, mysids, the snails and crabs, etc, all make for a reef. Unless you have a source for all this variety off the rock, you could be missing a lot, or at least wait a very long time for it to get introduced to the tank on something else.
Starting with dry rock, IMO, leaves you with rock that is colonized with some bacteria for filtration, but it isn't live rock. Just my opinion....
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Brad
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