i just got a penguin with the bio wheel i have it on for a few days, my tank is lookin great this thing seems to be an awesome filter!!! i bought the model that can handle up to a 50 gal even though i have a 20 so i'm sure this might have something to do with it, but is there any harm in this(having maybe too much filtration) i went with the bigger one in case i get a bigger tank setup soon!!! what are you opinions on this product??? thanks