I have a bio cube 29 that I am setting up. I have 40 pounds of live sand and will be buying some live rock this weekend to get a cycle going. My question is I was told that I could use base rock with about 10 pounds of live rock on top of it. The reasoning was that with the live sand and live rock on top it would make the base rock live again but save money on cost up front. I wanna do 25 pounds of live rock which will run me 200. Was just curious what everyone thought. New to this.