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I use a CPR Aquafuge...the one w/o the skimmer. I really like it. It's full of chaeto, has room to stick a bag of carbon in highflow area and room for my heater as well. And it sucks water into the fuge and the water flows back into the tank, which i think is better for the pod population.
My pump recently went out and was replaced with a mj1200...might be too much flow through the fuge...time will tell.
Definitely a good product, and can be had used round here or manhattanreefs for well under $100 ($45 for mine...just had to drive to Brooklyn).
I have it on the back of my 29g mixed reef. The only other filtration I use is LR and some hamiledia in the display. Xenia, I guess could be considered part of my filter, too...but no skimmers, sump, etc...