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RE: Copper toxicity

<color><param>0100,0100,0100</param><bigger>On 2 Jul 2001, at 22:40, -RJ- wrote:

<color><param>7F00,0000,0000</param> 

> I have never tried to introduce copper electrically from copper wires. 


</color>It was just something I read in an old magazine of 
a way to kill hydra... It worked most of the time.


<color><param>7F00,0000,0000</param>> I used Organi-Cure which is a

> tri-chealated (sp?) formula with formalin added. 


</color>Ah, a chealated form. Most chealates don't just let 
go in the medium but need to exchange one ion for 
another. You total Copper may of been high, but 
most was probably not in solution... Especially if 
you are working with soft water. A chelate won't 
let a divalent ion go for a monovalent sodium 
ion... 

As a side note, one of the most effective cures for 
velvet for me has been formalin (strangely enough 
at the dosage Wright uses to kill hydra...). I 
wouldn't use it on fry though...



<color><param>7F00,0000,0000</param>> Copper wire can be an alloy

> containing aluminum or some other metal...

> ... It is hard to imagine that sufficient copper could have eroded from

> the wire in 15 minutes to kill your fish, but not to effect the hydra.

> Especially with only a 9 volt battery and no acid in solution.


</color>I agree. What ever it was killed the fish at trace 
amounts. Aluminum is not as toxic as copper though. 
Zinc is one possibility but once again, copper is 
more toxic than zinc.


<color><param>7F00,0000,0000</param>> In electroplating which is done in an acid bath if memory serves, moist of

> the metal which comes off one electrode comes back out of solution on the

> other electrode.


</color>Not nessasarily the same metal as what came off... 


<color><param>7F00,0000,0000</param>> Despite my doubts about what actually killed your Nothos, we definitely

> agree on the fact that copper is toxic and lethal, just to what degree or at

> what point.


</color>I agree completely. Copper is a last resort cure!<smaller><smaller>



<nofill>
Tyrone Genade
Southern African Killifish Society Coastal & Offshore Coordinator
AKA 08248
tyronegenade at yahoo_com
http://www.geocities.com/tyronegenade

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