Mine is 200 lbs of Florida aquacultured liverock. If I had to do it over again, I would probably mix it up more, with some "dead " base rock, toped with liverock from various locations to increase biodiversity.
Nicole, that is one of the primary reasons I wanted to find a reef club.
However , I have some homemade live rock and some dry HI Rock, mixed in with really good quality live rock. The HI rock is kinda white and needs a while to develop coralliine algae but it is great in a pinch and helped me buy more live rock (most of the base rock is also under the sand anyways.