If you want to incorporate a fuge but don't trust a sump why don't you look into a Aquaclear 820 HOB take a look around on RC in the nano forum, there are many who convert this HOB into a fuge. I can tell ya it works great I have a 12 gallon nano with an 820 on the back of it and my corals love it. In the media section I have a small bag of carbon and a wad of chaeto that grows like mad. Other than bi-weekly water changes thats the only thing i have filtering it. In fact I have to admit my nano tank looks better than my 150 with all its trick gadgets, big skimmer and reactors.