Quote Originally Posted by Mr. Clandestine
So, have all these folks 'never used one' and not know what they're talking about, either?

smileibiza:

Sorry about that. Mine is smaller, I'm pretty sure... but still runs almost constantly. I usually begin to notice it losing effectiveness after about 1.5-2 years. But it goes back to working like a charm when the carbon is replaced.
Wish I knew what you meant but it appears other's experience mirror the statement I made in the first place.