RE: NANFA-- Neutralizing Chlorine

Geoff and Julie Kimber (gkimber2_at_earthlink.net)
Fri, 1 Jun 2001 11:03:23 -0500

The krib has avery interesting series of posts on chlorine and chloramine.

Depending on the concentration of chloramine in the water and the size of
the water change, you could end up with some serious ammonia problems with
thiosulfate + chloramine. 1 writer did the math and stated that a 30% water
change with 1pmm di-chloro-chloramine (NH-Cl2) would result in a 0.2ppm
ammonia concentration.

Here's the link. Read it for yourself.

http://www.thekrib.com/Chemistry/cl.html

Others also stated that a carbon filter may not be adequate to filter
chloramine, which means that I need to do some more investigating.

Geoff Kimber
Lexington,KY

-----Original Message-----
From: owner-nanfa_at_aquaria.net On Behalf
Of Mark
Sent: Thursday, May 31, 2001 10:33 PM
To: nanfa_at_aquaria.net
Subject: RE: NANFA-- Neutralizing Chlorine

At 9:17 PM -0500 5/31/01, Geoff and Julie Kimber wrote:
>Chloramine is nasty for fish because sodium thiosulfate breaks chloramine
>into ammonia.

As I understand it, the amount of ammonia that is contained in the
chloramine in drinking water is insignificant compared to the ammonia
produced by a living fish. Thus, simple dilution and biological filtration
will render it harmless once it is detached from the chlorine by the
thiosulfate. The chlorine, on the other hand, is deadly. That's why it's
used to kill bacteria, etc. The ammonia simply makes the chlorine more
stable in solution, preventing it from off-gassing quickly.

Mark
Columbus Ohio USA <))><
mbinkley_at_columbus.rr.com

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