the rock says....
agree with RR again. read through the tank setup section of this site which should be very helpful, make sure you have lots of rock and at least seed a sand bed. i believe in the plenum way to go, but that's just MO. make sure you provide a reef structure that is conducive for your fish to swim in and out of and places for them to hide as well as enough crevices and plateaus to place your corals