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[Killietalk] UV irradiation ... WAS ... Flow thru systems

Barry,

First let me thank you for your response to my email and I am sure we will all
benefit from the article you and Lee are creating.

Now to a comment / question ... and I hope this prompts a few comments back to
Killietalk because it is something I have debated over the years, both with my
killies and my bettas. The fact that I have a high respect for your fish keeping
expertise as well as for the general level of expertise on this list, makes it
seam like all the better place to begin this discussion.

On 14-Jan-04 Barry Cooper wrote:
>  This required UV irradiation on each rack and I still didn't seem 
> to find the time to change the water in the sump, which was the original 
> idea. I also had a feeling that my fish weren't doing as well as they should.
>
Could not UV be a bad idea??

Here is my reasoning.  Fish build immunity just like all other organisms.  The
literature I have read seams to indicate that much of the immune response in
fish is in the outer slime layer.

Are we producing an environment with UV that is hindering the production of a
healthy immune system.  As I am sure you know, as does anyone with much Bio
training at all, the rule is no antigen no antibody.  This could be especially
hazardous when we have a fry grow out system and use UV on that and then breed
the adult fish in environments where there is much more for their now, less the
full formed, immune systems to handle.  Even worse, IMHO, is shipping 3 month
old killies, raised under UV, to someone, especially someone new, who might not
be doing the rigorous water changes that need to be done.  In short the
question is are we producing weak fish using UV irradiation in grow out
setups???

Ok list, have at it!

Peace
john
------------------------------------o------
John N. Alegre                   o
Andante Systems               o
eCommerce Consulting       o
Custom Web Development <*{{{{}><
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