They are good uints but not needed. I have never run one on my
fowlr and have not had one on my reef in over a year. Some say that they can hurt a reef tank by killing off benificial critters and plankton ect.
I would spend money into setting the tank up and then getting a
UV after you got everything else you need. Don't skimp on a skimmer, put the money from a
UV into a better skimmmer or lighting.