ive had 2 so far, one of those lees disposable ones, and a penn-plax corner filter. they dont seem to be working. are they all like this? when i place a small piece of crap next to it, it doesnt even move towards it.
My corner filters work. The floss gets dirty. The water is crystal clear and much cleaner than tanks with sponge filters. They don't usually suck up poop, just debris and particles in the water.