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RE: PH/sponsorship
OK, OK, maybe I should have said that there are no _significant_ changes in
pH over the course of a night. To say there is a .06 degree change in pH is
probably not going to influence the fish or plants a whole bunch, you guys
can be a bit picky can't you?:-)
Colin
>From: "gooch" <gooch@tznet.com>
>Reply-To: apisto@majordomo.pobox.com
>To: <apisto@majordomo.pobox.com>
>Subject: RE: PH/sponsorship
>Date: Wed, 3 May 2000 07:53:21 -0500
>
>I have a few plants.. about 10% of the tank and my ph varies between night
>and day. With the lights off the ph drops gradually to 7.33ph. Once I turn
>the lights back on.. within about 10 minutes the ph goes up to 7.39ph
>I'll keep track of it once I start adding more plants.
>
>Phil
>
>
> >-----Original Message-----
> >From: owner-apisto@admin.listbox.com
> >[mailto:owner-apisto@admin.listbox.com]On Behalf Of Scott McLaughlin
> >Sent: Tuesday, May 02, 2000 5:23 PM
> >To: David Colin Gorton; apisto@majordomo.pobox.com
> >Subject: RE: PH/sponsorship
> >
> >
> >If there are plants in the tank, then CO2 will increase at night.
> >They will likewise
> >decrease during the day. This is due to the fact that CO2 is being
>released
> >at night and used during the day as part of photsynthesis. This
>fluctuation
> >in CO2 will cause a swing in the pH. Also, I don't think that
> >anyone has ever
> >proven that pH (within reason) swings have any effect on fish or plants.
>My
> >fish certainly aren't bothered by it. Well, at least not enough to
> >stop spawning.
> >
> >
> >
> >>I have heard this many times in the past and until now haven't had the
> >>opportunity to test this theory. Many people have also said that
> >having CO2
> >
> >>on at night makes very little difference to acidity.
> >>I am just about to install a totally automatic CO2 system and will
>include
> >a
> >>monitor to permit an accurate measurement of when and for how long the
>CO2
> >
> >>is switched on. Perhaps we can finally lay the ghost.
> >>
> >>BTW, as I've mentioned in the past, I'm in the process of starting an
> >>e-business (very small scale at first) and am looking at the idea of
> >>sponsoring original research into behaviour WHY of aquarium
>fish/equipment
> >
> >>etc. If anybody has any ideas as to what they'd like to investigate
>(esp.
> >
> >>apisto related if poss.) I'd be interested in hearing from you.
> >Sponsorship
> >
> >>would probably be in the way of good/materials.
> >>
> >>Colin
> >>
> >>
> >>>From: "Gregory Nielsen" <gnielsen@andinet.com>
> >>>Reply-To: apisto@majordomo.pobox.com
> >>>To: <apisto@majordomo.pobox.com>
> >>>Subject: RE: PH
> >>>Date: Tue, 2 May 2000 20:36:16 -0500
> >>>
> >>>Mike,
> >>>
> >>>the lower pH is probably due to a buildup of CO2 during the night from
> >>>plant
> >>>and animal respiration. The pH goes up when you turn on the
> >filter and the
> >
> >>>circulation helps to get rid of the excess CO2. If you have plants in
>the
> >
> >>>aquarium they can use up the available CO2 in the day and the pH
> >will rise.
> >
> >>>These pH swings are common in soft, poorly buffered water.
> >>>
> >>>Greg Nielsen
> >>>
> >>>
> >>>
> >>>
> >>>
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