On Mon, 24 Apr 2006 05:01:09 -0500, Dick wrote
(in article ):



Whisper filters provide the charcoal and filter bags separately.
However Penguin and Whisper both include charcoal in the maintenance
kits whether you use it or not. I have lots of charcoal on hand, darn
it.


Why not just leave the charcoal in? Even if you don't think it's doing any
chemical filtration, it's still a great place for nitrifying bacteria to
grow.

-E