Penguin Bio-Wheel 125

This filter is a pretty okay filter.
 
I didn't have it long, and it quit. It quit within 48 hours of setup so I emailed Marineland and they sent me a new Penguin 150.
 
Marineland Customer Service is great.
 
Also, while I did have the filter on the tank, the tank was crystal clear.
 
It was on a 10 gallon heavily stocked tank. The last picture is a picture of it after 24 hours that I sent to Marineland to prove my problems.