To see details on the enormous bioload I placed on mine, take a look at my lengthy post in this thread: http://www.reefs.org/phpBB2/viewtopic.php?t=35831
In short, on June 27, 2003, I put 250 lbs of Gulf-View live rock and 220+ lbs of live sand into my new 120-gallon. I didn't take anything off...