[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: CO2 Level
Shouldn't a PH probe and controller avoid this from happening? Wouldn't it
just turn the CO2 off at night when the PH dropped to the set value? That
was my understanding of using a PH controller with a CO2 setup. You could
airate or increase surface agitation to release some of the extra CO2 at
night but I still feel the PH controller should be taking care of this for
you. What am I missing?
Giancarlo Podio
----- Original Message -----
a.. To: "Aquatic Plant Digest" <aquatic-plants at actwin_com>
b.. Subject: CO2 Level
c.. From: "John T. Fitch" <JTFitch at fitchfamily_com>
d.. Date: Wed, 5 Feb 2003 17:15:11 -0500
----------------------------------------------------------------------------
----
Since installing a pH probe and controller, I've been pleased with the way
it holds the pH steady at 6.6, which, according to the chart, when
combined with a KH of 4, provides me with a CO2 level of 30 ppm. Ideal, I
thought.
But this new instrument also reveals that during the night, when the
lights are off, the pH usually drops to 6.5 or even 6.4. When I look up a
value of 6.4 in the chart, it says I then have 47 ppm of CO2. My
understanding was that level is too high for the fish. On the other hand,
I haven't noticed any unusual behavior, much less die off, on their part.
So, my questions are: Should I be concerned and, if so, what do you
recommend? Thanks.
John T. Fitch
www.fitchfamily.com/aquarium.html