and maybe leechs crap back out if old
hard to know what carbon removes as it's hard to test what was in your water
before
traces and stuff anyway



"Bret Miller" wrote in message
...
How So?
Adsorbs micro nutrients?


On Thu, 07 Sep 2006 17:48:18 -0500, dc wrote:

Brett Miller wrote in
m:

I know what AC is and how it works. What exactly does it do in an
aquarium? What is it adsorbing? Not the ammonia, NH3 or NH4 is it?
So what? Color, odor?

Colour, odor, some plant nutrients... lots of stuff, but no not NH3/4.
Use
Zeolite if you want something to absorb ammonia.

Active carbon is not really necessary, it is just a polisher, but it can
be
detrimental if you are keeping live plants.