I ran UV on my 90 for about 4 or 5 years. not saying you need one but I will not run a tank with out one most likely.
my tank was pretty much self feeding, I only gave the tang a treat of nori once or twice a month. the two mandrin which I had for 4 years till I gave them away found all there pods and such in the rock work, so if UV killed off food I never experianced it. and I had a larger than recomended UV on my tank.
Steve
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