I have setup a 30 gal aquarium a couple months ago. It has been cycled and has fish currently enjoying it. My concern is that it came with a UGF. I haven't heard anybody say anything good about UGFs. Would it be a mistake at this point to remove it and leave the tank with only the Penguin Bio Wheel filter. The Penquin has been operating throughout the cycle so it should have a pretty good size colony on it. If I should remove how is the best way to do it. Thanks.