My setup is as follows: 75 gal RR with a 30 gal refugium/sump. My main return is via a GEN-X 4. I'm using mostly chaetomorph(sp?) and some caulerpa in the refugium on a 24 hour light schedule. The refugium also has 5 inches of live sand in it, along with 8 nassarius snails, and a 24 watt light. The display tank has approx. 90 lbs. of various types of live rock and maybe an inch of sand. Water circulation is via 3 Maxijet 900's with Hydors on them, all connected to a wavemaker. I also have an Aquel 170 gph canister filter with an 8 watt UV internal to it that I run occassionally with some charcoal. In the sump I have an Aqua-C Urchin skimmer connected to a Maxijet 12. For lighting, I have a 48" Orbit Extreme fixture--2x150w10kMH, 2x130w230/260 Actinics, and 6x1w white Lunar lights.
I set up the system about 6 months ago with just the rock and let it just sit for 2 months before adding some snails and hermits. 2 months later I added 2 brittle stars and 2 emerald crabs, and began to introduce some coral frags--a frogspawn, an anchor, and a chili coral. The following period I added some more corals and 3 fish--a Scribbled rabbitfish, a Tomato Clowfish with a Bubbletip Anemone, and an Orchid Dottyback (fridmanni). And that is where my tank is at now. LOL--sorry to be so long winded.