Back in November 2013, I set up the 400g anew after a very long wait for the aquarium to arrive.  I got my rockwork just right, added my corals, adjusted the lighting period, and tended to my reef.  My general rule is keep my hands out of the tank, something I tell people often.  Here's the reef, two years later. Some things have obviously moved, but the majority of what you see is what I had back then, just smaller.