I think the topic is good but how do you control your chemical balance with only that type of filtration? I had problems with my nitrate and trites being real high. If you put live rock in to help then you can't treat ick with copper because you will have to take the LR
out sooner or later to take down the tank. A skimmer is expensive, a DSB
wouldn't cost much but you needs something so keep it clean and chances are your chemicals to treat a disease will kill them.
This hobby is a lose - lose situation. I fell you just have to be real LUCKY!!!! or be rich and buy all the necesarry mechnical filtration for a quality Q. tank.