[BoomerD]

Well, how about more information on your set-up? How much live rock? My first thought, it that you're using a biological media (bio-chem) that will create huge amounts of nitrates in your tank, which for a FOWLR, may not be TOO bad. (depending on what species you keep) For a FOWLR, you MAY need that external filtration, or you may not, (again, depending on your bio-load and what species you keep)
For a reef tank, live rock should be your main filtration source, NO outside mechanical filtration, NO outside biological filtration. I know this is counter to what we've always done for freshwater tanks, but the live rock becomes a VERY efficient biological filter, even to the point of helping reduce nitrates, HOWEVER, you need to have a LOT of rock in the tank, usually recommended at 1-1/2 to 2 lbs/gallon.
You'll find that the vast majority of us run our reef tanks with ONLY live rock and a good quality protein skimmer. FOWLR tanks can be operated the same way, although you do need to keep a good eye on your bio-load.
I'm a strong believer in protein skimming. It helps remove pollutants from your tank that you may not get out any other way, and even removes some things BEFORE they can become pollutants. I also like carbon filtration on an occasional basis, to remove colorants and chemicals from the water, but NOT run 24/7...