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[APD] Re: Water Chemistry (cories)

> Message: 3
> Date: Sat, 13 Sep 2003 02:54:50 +0000
> From: "Seweryn Bialasiewicz" <s_bialasiewicz at hotmail_com>
> Subject: [APD] Water Chemistry
> To: aquatic-plants at actwin_com


> As a side note, I have noticed that in my newly set up 3' tank, my 5 cories
> (the only fish in so far) are occasionally shooting up to the surface in
> what looks like swallowing some air. (I have observed this in the evenings).
> Is this a sign of low oxygen content in my water? (I have 8 healthy looking
> plants in there, plus good water circulation)
> Thanks for the help,
> - Seweryn


    This is apparently normal behaviour for cories; I've read that they have
the ability to absorb oxygen through the walls of their intestines. I have
five C. trilineatus in my 100 gallon and they do this even when the water is
saturated with dissolved oxygen and the plants are pearling madly.

Ron Barter
Perth, Ontario

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