That looks very nice. I especially like the blue color your lighting gives to your rockwork... What kind of lighting is it?
If you are just starting your tank it may be a little early to put a green chromis in. Cycling with a fish can be lethal to them or at least weaken them greatly. I normally recommend cycling with a raw shrimp from the grocery store.
Well from your pictures there was no way to tell that. It went from empty tank to one with a fish in it. It looks very nice though and I'm often stingy with the complements...