If your biowheel stops spinning, check your local dealer and see if you can get just the black footpads that go on the ends. Sometimes a little vaseline on them will remedy the situation also. If they aren't spinning and completely wet they aren't doing there job.

Pros: The biowheel was agreat invention

Cons: Not always out of life

my tank is very clean with this penguin 150B with the biowheel. at first I was wondering how important this wheel would be but I feel it does make all the difference.

Pros: the wheel seems to do a last bit of getting out gunk, and keeping the tank clean

Cons: none to complain of yet