Re: Humus, humic acid and natural chelating agents

• To: Aquatic-Plants at actwin_com
• Subject: Re: Humus, humic acid and natural chelating agents
• From: Craig Bingman <cbingman at netcom_com>
• Date: Sun, 2 Jun 1996 17:55:37 -0700 (PDT)
• In-Reply-To: <199606021939.PAA13618 at looney_actwin.com>

> > Humic acids are removed by activated carbon.  There are clear 
> > implications for fate of trace elements in aquaria, perhaps Espe
> > freshwater aquaria, in that statement.

> That's why few aquatic gardeners use carbon in their systems ;-)

Ah, but I don't believe that I've ever heard anyone say that the removal 
of trace elements is mediated by their removal as humic acid chelates.  
And I also know of some experimental determinations indicating that trace 
elements are not removed by activated carbon (in otherwise pure water) 
except at extreme pH values.

Craig
 

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