RE: Carbon in Filter Cartiridges

["Matt Wassenhove" <Wass29 at qconline_com>]

Scott,
The charcoal is "active for about three weeks and then slowly the activeness
deteriorates for about another 2 weeks.  That is why the company's all
recommended replacing them every 4 weeks, so that you keep it active and
fully charged.


>Date: Mon, 25 Feb 2002 03:43:30 -0800 (PST)
>From: "S. Hieber" <shieber at yahoo_com>
>Subject: Re: Carbon in Filter Cartiridges
>
>A number of folks have noted that, for planted tanks, its best to slit
>the Penguin/Marineland filter cartridge and dump out the charcoal --
>the charcoal is not needed and might filter out some useful organic
>materials.
>
>Well said; easily done.
>
>
>I was thinking this: some of these cartridges have so little charcoal
>- -- it doesn't even make a contiguous layer one particle deep -- that
>it's effectiveness is probably negligible to start with and whatever
>effectiveness it has is probably exhausted in a very short time.
>
>Has anyone done any measurements on charcoal (activated carbon, not
>anthracite) effectiveness and how long it lasts?
>
>Scott H.

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