Re: pinhole winogradsky columns

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From: Karen Kalumuck (karenk@exploratorium.edu)
Date: Tue Nov 09 2004 - 10:52:48 PST 

Message-Id: <p05010400bdb6c20cce42@[192.168.112.11]>
Date: Tue, 9 Nov 2004 10:52:48 -0800
From: Karen Kalumuck <karenk@exploratorium.edu>
Subject: Re: pinhole winogradsky columns

Hi Kelly -- usually they don't smell badly, but it depends on what
extra "goodies" you put in....if you put whole eggs into small
bottles, that's too much material and it will stink. Do you have the
tops covered? Use Saran wrap and just punch small air holes with a
pin. Also, are you using a very low wattage light bulb? No greater
than 40 watts -- otherwise you can cook both the added materials and
the microbes. Warmer temps could also contribute to the stink.

Hope that some of these suggestions help.

---Karen 

-- 
Karen E. Kalumuck, Ph.D.
Biologist/Educator
Exploratorium Teacher Institute
3601 Lyon St.
San Francisco, CA   94123
415-561-0388
FAX  415-561-0307

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