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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: Mon, 8 Jul 2002 06:26:26 -0600
- In-reply-to: <200207080748.g687m2629141 at acme_actwin.com>
- References: <200207080748.g687m2629141 at acme_actwin.com>
On Monday 08 July 2002 01:48, Wayne Wah wrote:
> Firstly, thanks John Wheeler and Alex R for their help about my shrimp
> death. It seems like chloride is the culprit. Before I get the
> dechlorinator, I would like to know if it ONLY precipitates chloride ions
> and not other nutrients useful to plants.
First, the idea that chloride has anything to do with your shrimp deaths is
very unlikely. Chloride is one of the 7 most common electrolytes found in
water. It is ubiquitous, we all have it in our water and it is nothing to
worry about. For all intents and purposes chloride is biologically inert
at concentrations found in fresh water.
Second, chlorine is a chemically different beast. Don't get the two
confused. When dechlorinators "deactivate" chlorine they ultimately turn it
into chloride. Chloride does not get turned into chlorine by any common
natural process, biological or otherwise.
There is little you can do that removes chloride from water except anion
exchange, RO and distillation. It doesn't form precipitates with anything
until concentrations become very high, as when sea water is evaporated to
precipitate salt. Table salt is 60% chloride.
I've been keeping C. japonica for a couple years now and I dose my tanks with
potassium chloride. And potassium iodide, for that matter, though I don't
find the iodid as useful for the C.japonica as it is for ghost shrimp.
I've read that C. japonica inhabits fairly brackish waters in it's native
habitat. If so, then a lack of sufficient chloride is a more likely cause of
problems then is it's presence; brackish waters commonly contain into the
thousands of mg/l of chloride.
Other possibilities might be; your supplier is selling you stressed animals,
your tank carries a pathogen that kills the shrimp, your water contains
lethal levels of a metal (copper for instance) that the shrimp are sensitive
to, or that some other additive that you are using in the tank is toxic to