Re: conductivity question

[Mike & Diane Wise <apistowise@fgn.net>]

Coby,

Conductivity & hardness are actually 2 different things. Conductivity is a
measure of electrolytes (elements & compounds that promote conduction of
electricity (electrons, actually). Minerals that harden water can also conduct
electricity. Other minerals (sodium chloride, for instance) do not harden water
very much but increase conductivity greatly. It seems that you have some source
that doesn't harden water, but does increase conductivity. As Dave said this is
most commonly found in organic compounds dissolved in water, but sand & rocks
(even wood) with quantities of chlorides, nitrates, sulfates & even carbonates
that dissolve moderately slowly can cause the problem. Your Dicrossus do not
like high conductivity, but A. cacatuoides, A. borellii, & Pelvicachromis
pulcher are sometimes found in waters in the wild with conductivity around 500
µS. Actually, the Common Krib has been seen breeding in brackish areas of the
Niger delta.

Mike Wise

the dude wrote:

> Excuse my ignorance(which is why Im asking a question in the first place)
> ... but Idont understand why my conductivity doesnt stay where it is out of
> the tap. My tap water is 30microsiemens but I had a tank with just one pair
> of Dicrossus filamentosus and a bunch of plants on some sand from pool sand
> filters. The conductivity was over 500 microsiemens, no wonder they weren't
> spawning?
> How can it increase? does accumulated fish waste cause conductivity to
> increase? or what is happening?? Also used a lot of Dehumidified water on
> that tank which is 10microsiemens. How could it be so high?
> how can I lower it?
>
> thanks
> coby
>
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