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Re: O2 pearls from plant stem breaks
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To: Aquatic-Plants at actwin_com
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Subject: Re: O2 pearls from plant stem breaks
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From: Stephen.Pushak at saudan_HAC.COM
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Date: Tue, 2 Jan 96 10:15:29 PST
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In-Reply-To: <199512282039.PAA10879 at looney_actwin.com>; from "Aquatic-Plants-Owner at actwin_com" at Dec 28, 95 3:39 pm
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Mailer: Elm [revision: 70.85]
Paul Krombholz wrote:
>
> Plants do really produce O2 when photosynthesizing,... Aquatic
> plants have an interconnected system of air spaces that runs through the
> leaves, stems and roots. When photosynthesizing actively, the O2 produced
> is added to the air spaces, and the pressure goes up until the gas starts
> escaping from some break in a leaf, stem, or root.
I have seen air bubbles rapidly forming from four spots on a cut stem
of Bacopa. The spots were precisely symmetrical in location and I have
no doubt that these bubbles were streaming from the air transpiration
tubes of the plant. There was such a large quantity of bubbles that
there must be a considerable amount of air present in the roots and
stems of the plants. Next time y'all trim plants, take a close look at
the cut stems; you can see the air channels with your naked eye
particularly on thick stemmed plants.
Matt Van Buskirk wrote:
> Subject: substrate question
>
> I am currently suffering substrate problems. I have come to find out
> that my $20 a bag gravel is causing my pH to raise to 7.6 and
> stay there. Even my co2 tank is doing little to lower it. What evil
> chemistry principal is at work here, and how do I combat it. I seem
> to believe my only option is to remove my $100 dollar investment and
> pave my driveway with it!
Have you considered Tanganyikan Cichlids Matt? ;-) Seriously though,
your gravel probably has a large quantity of crushed sea shells
(calcium carbonates) Try putting some of it in a jar of distilled
water and measure the pH or carbonate hardness if you have a test
kit for it in order to confirm this. Perhaps one of our chemistry
experts can suggest a good test. I don't think there is a suitable
remedy without removing the gravel; you'll have to live with that
pH and hardness. Probably not ideal depending upon your intended
application.
If you purchased this from a pet store retailer sold as gravel
suitable for a fresh water aquarium, then you probably have a good
chance of getting a refund if you explain the situation to the
retailer; after all, your business and his reputation is worth a lot
more to him. He may want to return his gravel supplies to his
unscrupulous supplier too. If you used gravel intended for a salt
water aquarium, well, you shouldn't do that and can't really fault
the retailer.
Steve Pushak spush at hcsd_hac.com Vancouver, BC