F fishorama AC Members Jun 28, 2006 12,704 2,132 200 SF Bay area, CA Jul 17, 2008 #11 Cute O. Carbon should go just before the water returns to the tank. The way it sounds like you have it the carbon is, in essence, mechanical filter media. You don't really need any carbon unless you are trying to remove meds or something.
Cute O. Carbon should go just before the water returns to the tank. The way it sounds like you have it the carbon is, in essence, mechanical filter media. You don't really need any carbon unless you are trying to remove meds or something.