Well the title doesn't really do this discussion justice as I have hit a bit of a road block setting up my 90g.

My previous two tanks that i have set up, i've always added the sand first than put the rock in. I've seen some people place egg crate in the tank to help stablize their LR. Since i want to do this new tank about as perfectly as i can i just picked some up. Cut it and placed it in. Have about 40-50lbs of dry rock and started messing with some aqua scapes.

Came on Captive reefs and starting chattin with jim.

I have great success with my two smaller tanks (35g hex and 20tall).

Should i ditch the egg crate?
Should i lay the rock out how i want it than add sand?
How should i go about this. I would like some input. I thought i had this figure out now im just confused.