Well it's my first Reef Tank, a 24G Nano, been running for 18 months with no real trouble.
4x 36W T5's & filtered with Living Rock and Bio Balls, no Skimmer just weekly water changes.
Inhabited by 1 Common Clown, 1 Randalls Shrimp Goby, 5 Sexy Shrimp & a Pistol Shrimp.
Corals are 8 Ricordea Florida, 1 Yuma, various other Mushrooms, Bush Coral, a strange Sub-species of Xenia and the real gems which seem to be the most thriving are a bright green Caulastrea which has tripled in size and a Trachy which has probably doubled in size!
My only complaint is the tank can't hold as much as I want to put in it! LOL