Re: [RML] Sudden death

Gary Lange (gwlange at stlnet.com)
Fri, 28 May 1999 12:34:18 -0500

I think heat is one of the stress points but it is just one of many, if the
TB germ is present. Low water quality, especially low pH or large pH swings
can also easily cause an outbreak. With my low buffering capacity of my
water I can get an outbreak even in cooler tanks. This is also something
that our members with hard water rarely experience. And the only ones that
do see this are members that are experiencing extremes in temperatures. The
one fellow out in LA who does constant water changes saw a bit of it in his
fish room when the water temperatures were up in the high eighties for
several weeks. His water is like a rock, 250 ppm gh, KH unknown.

Stress brought on by other fish is also a good way to start an outbreak on
fish who have been exposed. One large fish w/o enough to keep him busy will
start bothering some of the smaller fish and before long some of them will
start exhibiting some of the symptoms, ie sores, wasting away or dropsy.
Also the hole in the mouth has also been observed.

Some fish are more resistant than others. Bruce mentioned it, Goyder Rivers
get TB the quickest. M. boesemani, in my hands is the toughest. Some of
the other Tris, like Coen river and Canoe creek seem pretty hardy too. BTW
TB will also spread pretty quickly to tetras too. The next time one of you
talks to Ron Bowman you can tell him about my new "canaries" that I'm using
to make sure I don't have any outbreaks. He had been breeding the emperor
tetra (palmeri) and had been doing pretty good with them. I picked up the
black emperor, lacortei, and kerri along with a couple of others that are
unknowns. Have to keep just a few non-bows and gudgeons to keep it
interesting.

gary lange

-----Original Message-----
From: Adrian Tappin <atappin at ecn.net.au>
To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
Date: Tuesday, May 25, 1999 3:37 PM
Subject: Re: [RML] Sudden death

>
>A mixed tank of rainbowfish species. I have seen and heard of this
occurring
>a number of times. I don't know if the other species have some immunity or
>not, but its one of the reason that I discount the theory that water
quality
>is the major contributing factor that causes this outbreak. There's no
doubt
>that it probably is a contributing factor, but not the main one.
Personally,
>I think high temperature is the triggering factor.
>
>
>There is some on-going research in some universities for the aquaculture
>industry. Perhaps in time?
>
>Adrian.
>
> Adrian R. Tappin
> Brisbane, Australia.
> "Home of the Rainbowfish"
> http://www.ecn.net.au/~atappin/home.htm
>