I thought I would shock everyone by providing an update! Things in the tank are going well. I should actually be back in the frag business again soon. All I did to fix things was change my water change procedure. Now, I vacuum the sand bed every week and discard 50 gallons on vacuum water during the 50 gal change.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank:
http://www.canreef.com/vbulletin/showthread.php?t=28436