Here are some pics of my rock setup. All but three pieces came from my old 90g tank and they don't have a lot of coraline on them. I bought a few more since I have two feet more space in the tank. I can not believe the difference that it makes going from a tank that was 13" front to back to a tank that is 18". My rock doesn't look like a brick wall. I also built a PVC support system to create a cave-like atmosphere and serve as a super structure to hold up the rock. The PVC makes a frame and I put eggcrate on top of it to add support. I still need to cover it in a few spots, but most of it is hidden pretty well. I think I will layer some epoxy over the pvc that I can see and push small chunks of rock into it to cover it up. The two pipes running down the corners are returns from one of my GenX pumps. They keep the water moving under and behind the rock. My Yellow Tang and Royal Gramma, the only two fish in the tank so far, love hiding in the rocks and zooming around the tank. I have added 12 hermits, 6 Astreas, 6 Turbos, and two Queen Conchs. The conchs are very amusing to watch. Sometimes I think they are watching me instead of the other way around.
That's all for now...