Yes they do bubble a lot. Fine mist bubble stones can be used to take down some of the movement if it causes too much in your tank.
I use an undergravel filter with my usual power filter. I never use it alone. People that do that then complain, drive me crazy.
Power filters are great, until you reach the gravel. Sure vaccuming your gravel and/or keeping plants help. But if you don't have plants, there's always that little bit you miss while vaccuming.
Call me paranoid, but I like clean gravel and the ugf helps. Of course it won't work for the entire tank and there. Its undergravel filtration, its not designed for full tank filtration which seems to be what its thought to do.
It beats nothing if you have nothing else, but its really just for your gravel. Its not for filtering all the water in your tank.
Last edited by Kuronue; 03-01-2013 at 03:25 PM.