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Re: "string of pearl" bubbles really O2?
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To: Aquatic-Plants at actwin_com
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Subject: Re: "string of pearl" bubbles really O2?
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From: Nick LaRocca <nickl at css_sed.monmouth.army.mil>
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Date: Wed, 27 Dec 95 18:05:23 EST
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In-Reply-To: <199512270839.DAA06768 at looney_actwin.com>; from "Aquatic-Plants-Owner at actwin_com" at Dec 27, 95 3:39 am
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Mailer: Elm [revision: 70.85]
> Just out of curiosity, has anybody ever really checked to see if the bubbles
> rising from underwater plants are really O2 - or just CO2? A couple of
> things make me wonder if it might be the latter:
>
> 1. I've never noticed these bubbles in a plant tank without CO2 injection -
> no matter how intense the light.
>
This is O2. I can assure you it is a daily occurance in my tanks, and I have
no CO2. It does require a high light intensity, however. It also requires
some duration of light and never happens until my lights have been on a while.
> 2. The way streams of bubbles seem to be emitted from a single point on a
> leaf sure seems unlikely.
>
The O2 collects at "disturbed" points on the leaves, such as small cuts or
breaks in the leaf surface. So it only appears to bubble from a point.
> 3. It just plain LOOKS like the bubbles that rise from the bottom of a
> glass of seltzer water!
>
Maybe that's why the fish collect around there carrying tiny drinking
glasses :-)
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* Nick LaRocca e-mail: nickl at css_sed.monmouth.army.mil *
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