Re: PH crashing Up?

[Apist-O-Rama <apistorama@fancifulfins.com>]

        Sorry John, Tomoko is right.  CO2 basically turns into carbonic 
acid in water, which drives the pH down. So as the plants use up the CO2 pH 
will also go up.
        This is why some people say you should turn off your CO2 at 
night.  At night plants stop using CO2 so the CO2 will build up and can 
possible cause a pH crash. Admittedly I leave my CO2 on all night ad have 
not seen any negative effects.

Eric


At 10:42 AM 4/25/03 -0400, you wrote:
> I always thought it was the other way around, that plants in a tank
> would cause your pH to go down..... at least they do in my tanks.....
> the pH in my planted tanks is muchhhh lower then the pH in my non
> planted tanks....  I cant remember, but i thought that by driving off
> CO2 you caused your pH to go down... Plants thrive on CO2 which is why i
> thought the pH in my planted tanks was lower then that of my barebottom
> tanks....
>
> John
>
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