Well, if its powered by a pump, then I wouldnt think so... on my 30 gallon, I actually took a really big hang on filter, stuffed it with substrate, rocks, and then the speed on low. It grows all sorts of little critters, and the tank is crawling with them. I dont put any plants in there, but there are sponges growing in it (little q-tips, great natural filters) and then the lr rubble gets me all sorts of pods and microfauna. And since the water just lofws right back into the display tank, u dont haveta worry about the blades chopping the things up. I use a skilter filter, its got two chambers, comes with a skimmer built right in, but the skimmers crap. I took it out. THen, I just added a prizm skimmer on the side, heater in the display and ph in the display, and i was set. Its a pretty neat setup.