RE: PH/sponsorship

["gooch" <gooch@tznet.com>]

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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