What comes first fish or coral?

[Sherman]

I'm not trying to be argumentative ( wish I had spell check here).
Just, when the tank is 100% cycled, whats the harm in adding a few mushrooms and button polyps to brighten up the bare rock?
I'm not advocating loading it up with expensive sps.

The distinction comes when you differentiate "cycled" and "mature." While a cycled tank will have decreased the swings involved with the nitrogen cycle, the mature tank will have done so even more. The mature tank will also be better stocked with microfauna and filter feeders, and all those tiny things that actually create the complete closed eco-system.

While a new tank cycle should be done within roughly 6 weeks, you should be waiting at least a year before adding an anemone, for example. Again, maturation versus cycled.

Edit: BTW, thanks for the ZoaID.com banner! A close friend is the guy running that site, as well as our own club's, cvreefers.org.