i havent read the prevoius posts, but i'll make myself short.
UGF, dont remove dibris, it jsut help it stay on or in the gravel where it can not be seen.
other filters remove the debris into the filtering chamber which can be cleaned easily.
UFG, looks bad plus UFG + air pump needed = probably same price as some kind of AC HOT filter. i recommend aquaclear to anyone, unless the filter can not possibily handle the bioload. thanks!