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Re: PH/sponsorship
I have seen a swing from 7.6 to 7.8, I don't even get to the hundreths place :-)
David Colin Gorton wrote:
> 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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