Thanks you guys! I can't take a lot of credit for it, since I couldn't really see what I was doing when I stacked the rock.
I have a few little things I want to do to tweak it.
My biggest problem now is the sugar sand - and all the flow in the tank. Still having problems getting it clear. Managed to get it clear once, but any movement in the tank stirs up the sand and clouds the water pretty quickly. I think I am going to get some live sand and put another 1" layer on top of the sugar sand to hold it down. Wishing I hadn't gone with it now.