Finally hooked up the FX5. A little disappointed the clips didn't hold tight against the tank because it is too thin, but I made some shims to jam in there so it was tighter and they work well now. Man this thing really cranks the water around. I think my fishies are super happy now. Water seems clearer too, but not by much. It wasn't too dirty or cloudy before, but I am looking to make it crystal clear. I have Seachem rocks and ceramic rings, with only one finishing pad. We'll see how it goes after a week or two.