Woah, I never said you don't need good filtration on a reef tank. I said it doesn't have to be as good as one for a fish only tank, one containing large fish. You can run a reef with, like i said, a wet dry sump with a moderate turn over, a protein skimmer. I said a reef doesn't need as great of a filtration system, come on guys. I was trying to emphasize that your strong point in a reef should be lighting, not filtration, which doesn't mean that you can have inferior filters on a reef. A reef tank, even up to 120 gallons, only truly needs a sump for mechanical and biological filtration, a skimmer, and very plentiful lighting. A true reef would in turn care for itself. I know this because I've maintained a 120 gallon reef tank for 5 years with that set up. No major losses.