Originally Posted by Coral Keeper
The only thing that can go in a flouresent light fixture is a flouresent bulbs thats it.
T5 and VHO (T12) are types of fluorescent bulbs, but since T5 are only 5/8" diameter, they usually need their own endcaps.
like reefreak said; corals need the most intense light that you can give them, and if you want the best, go the T5 or metal halide route. if you arent too concerned about keeping clams or sps, then you can get away with using compact fluorescents or VHO. im guessing that right now all you have is the stock fixture that came with the tank, and if you are looking to upgrade to any of the mentioned lighting systems this is no longer needed. which ever lighting system you decide to go with, they are not cheap, but it is one of the most important parts of a reef setup.
please remember that anemonies are not only hard to care for, but take a long time to grow in the wild and are very bad shippers. if you have clownfish, they will be fine without one, and will most likely host something else in the tank.
-Justin