Don't know bought that, but know a great place to get dry rock. Great price and excellent quality. Try reef rocks.net. Talk with Steve the owner and tell him Justin sent ya. He will give ya a great deal
thanks everyone. If i buy a dry rock, can i place it directly in my 6M tank that is already up and running with fish and corals? I have about 60lbs of rock in my 90g tank and want to add some more now.