On Sat, 20 Nov 2004 09:28:05 -0800, "Billy"
wrote:



"Limnophile" wrote in message
...
| They don't REMOVE ammonia and nitrites persay.
| What they do is provide an excellent environment for the
| bacterium that process the waste in your tank. The alternating
| immersion\emmersion seems to be superior to media that is always
| underwater.
|
|
| They are pretty good when they work. You may have problems with thw
wheel
| getting stuck, or not turning if water flow decreases. I tried a
few, one
| worked well, 2 kept getting stuck.
|

Correct. It is important to keep the axles and axle-ways clean and
free of debris. It is normal for an established bio-wheel to 'hitch'
or stop on occasion, but if it stops long enough for the pleated
fabric to start drying, you have a problem. I prefer the filters with
a spray bar that is directed at the wheel to keep it rolling. Even
with the wheel loaded up with 2 years worth of gorp and slime, as
long as I keep the axles clear, it never stops.


What is the brand? How big are they. I foolishly positioned my 75
gallon tank too close to the wall and have a tight fit with the
Penguin 330s. I think it is about 4 inches of room to the wall.

dick