[dhboyd1]

There are also ways to make your own dead rock using white cement, aragonite, coraline sand and shell fragments. It's pretty cheap but needs a lengthy curing time. As for LR, do some reasearch and see what might be the lightest most porous rock. Each part of the ocean produces a different type of rock. One company I know offers Fiji Cultured Live Rock that is basically the same process above that has been sitting in the ocean for awhile. My 55 gal tank started with 35 lbs of dead rock, 55 lbs of live rock, 50 lbs live sand(don't forget the live sand). My dead rock (it alive now) has feather dusters, coraline algae and is home to my crabs.