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Re: shrimp deaths
- To: Aquatic-Plants at actwin_com
- Subject: Re: shrimp deaths
- From: Roger Miller <rgrmill at rt66_com>
- Date: Tue, 9 Jul 2002 05:12:22 -0600
- In-reply-to: <200207090748.g697m3s03507 at acme_actwin.com>
- References: <200207090748.g697m3s03507 at acme_actwin.com>
On Tuesday 09 July 2002 01:48, John Wheeler wrote:
> I just started using Amquel. I'm interested to see if
> it leads to more shrimp deaths based on this new info
> to me.
The amount of chloride you generate by using a dechlorinator is
insignificant. On the other hand, according to Wright the Amquel itself
might be lethal to your shrimp.
> Wayne (I think), nor Roger, mentioned how much KCL
> they were using.
I does 1/2 tsp / 35 gallons. That's about enough to add 12 mg/l of K+ and 11
mg/l of Cl-. That's on top of 22 mg/l in my tap water, for a total of 33
mg/l. The actual chloride concentration in my tanks would be higher than
that because of evaporation and other chloride sources.
The drinking water standard in the US is 250 mg/l chloride. Other countries
probably have similar standards. As a result, some of us could be keeping
their shimp in tap water with quite a bit more chloride than I have in my
> If they do live in brackish water then Chloride
> without the Sodium would be a problem, right?
I have no reason to believe so. There is no unique association between
sodium and chloride while they're in solution.
> from Aqualog Special "Shrimps, Crayfish, and Crabs in
> the Freshwater Aquarium", Uwe Werner, author:
The page at
describes their natural habitat as marsh- including brackish marsh - and
provides some guidance on care. By and large any brackish or fresh water
animal can withstand large variations (1000s of mg/l) in salinity and
> Very possible, however; no deaths since I stopped
> adding KCL, 1 year ago, and no newly bought shrimp in
> one of my tanks. Some are over 3 years old. When using
> KCL, I would lose a shrimp once a month, per tank, in
> a stock of about 50 (shrimp) all together.
> I know this is anecdotal. YMMV, Blah, blah blah.
Anectdotal is usually OK if you can come up with some backup for your
conclusions. It's going to be hard to show that either potassium or chloride
at "fresh water" concentrations is toxic to anything at all.