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Re: Kordon Bags For Incubation

Allen,

Your point is well taken and like anybody who is going to make a test to
speak to it's results, parameters must be identified and the results
recorded.  To that end my test will compare two bags.... 1.5 mil 4 x 6 bag
with a 4 x 8 Kordon bag.  Equal amounts of peat moss and eggs will be placed
in the bags and placed in same incubator.  I will report the results of the
number of eggs that hatch from each and the condition of the peat in each
bag, etc. etc.  This test is not only for my own education, but I think it
will be fun to share with the list as Allen suggested.

Thanks Allen for your thoughts.

Greg A. Simpson
Billings, Montana
AKA# 07981

>
>Date: Wed, 25 Oct 2000 18:14:39 -0700 (PDT)
>From: Allen Johnson <allen_h_johnson at yahoo_com>
>Subject: Re: Kordon Bags For Incubation
>
>As in nearly all plastic bags, there will be some
>gaseous exchange through the bag.  However, the Kordon
>bags are particularly permeable for oxygen and carbon
>dioxide gases.  I suspect that this means that these
>bags are really permeable for water vapor.  That means
>that using Kordon bags may result in much more water
>vapor loss and therefore dessication of the peat moss
>in which the eggs are incubating.  This may result in
>the peat drying too much and the eggs in storage stop
>development and possibly )Probably) die.  Before I
>would risk any eggs, I would run a test of peat in my
>normal bags and compare the peat stored in a Kordon
>bag.  At the conclusion of incubation time, I would
>compare peat.  I think you will find the peat to be
>very dry compared to a normal bag.  
>In no way is this a criticism  of Kordon bags because
>they are excellent at facilitating gas exchange and
>therefore allowing fish and invertebrates to survive
>long periods of time in the bag for transport.  If you
>have access to Kordon bags run the test and report the
>results to the list.
             

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