I have a 25 gallon community tank at work. It started out with just an under gravel filter. About 3 months ago, I added an Aqua Clear 30 to the tank. Today I decided, it was time to eliminate the UGF. I read a couple faqs, and decided it was worth it to be-rid it. I was very good with maintenance as far as gravel vaccuuming ect, so I was not too concerned. I pushed the substrate near the front of the tank, and pulled the UGF up towards the back. I feel really sorry for the fish, as it was quite nasty. I did about a 40-50% water change after pulling it out.. it's starting to look ok now. Is there any other pointers I should consider? I will do a water test tommorow morning, as I'm not at work anymore tonight. Has anyone else done this will good success? Thanks.