Build up a good base of live rock, some of it within 8" of the surface, lots of caves and pass-throughs.
Got skimmer?
Adequate sump?
What sort of lights?
Flow/return pump?
If you answer those, and test reqularly and keep records, your tank is old enough to handle most reef items. I have good coral growth in a 6 mo. old tank with a full load of rock and inverts.