RE: [Killietalk] Wouldnt agree with...

[Charles Harrison <charles at inkmkr_com>]

At 7:14 AM -0800 12/5/04, Scott Davis wrote:
>  > In some cases I've dealt with the carbon actually
>  becomes biological....

> would some of the "stuff" adsorbed
> by the carbon be released back into the water column?
>
> Thanks and all the best!
> Scott
	Theoretically this is what should happen. The surface area of 
Activated Charcoal is so great that a steady state or equilibrium 
should never be reached though, if it is used the way it is supposed 
to be that is. The actual facts go something like "what charcoal? 
where am I supposed to put it? and do I really need to replace this 
stuff, What are those black things in my sink?"


Most aquarium use of charcoal overwhelms the capacity in a matter of 
weeks and yet it is maintained as some kind of reservoir for aerobic 
bacteria or nitrifying bacteria or what ever . . .  Actual use of 
Charcoal should be targeted to some specific need as in Chloramine 
removal or H2S removal and the end result be monitored and tested 
regularly to know when to replace the or regenerate the stuff.

Actually Chlorine on the back of good clean Charcoal will be 
chemically changed to Chloride in the open aquatic system given 
enough time and Oxygen. Most of us who use it though use it so fast 
that this is not allowed to occur and we must replace it to maintain 
no chlorine. The rate of the reaction is incredibly slow, but it can 
get into the way of analytically testing for Chloride in a purified 
water stream.

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