Re: co2 injection

To: Aquatic-Plants at actwin_com
Subject: Re: co2 injection
From: Shawn Ferguson <sferg at cyberus_ca>
Date: Thu, 13 Feb 1997 11:33:18 -0500
References: <199702130839.DAA20151 at looney_actwin.com>

Griff wrote:
That one piece of
airline tubing is run into the uplift tube of my Whisper 3 power
filter.  I
have it constucted this way so the CO2 bubbles will be "chopped up" and
will
dissolve into the water easier.  When I first test the water (before the
addition of CO2) the ph was 7.8 (the highest my test kit went up to) and
i
can get it to drop down to 7.2 with CO2.  My problem is how can i get my
ph
to drop down into the 6.?? range?  

When I injected CO2 from a 2L bottle into the Aquaclear 200 on my
25gallon tank I acheived a pH of ~7.0. Inside my filter I have two
sponges, when I moved the airline tubing so that the bubbles were being
released into the space between the two sponges, the pH dropped to
between 6.6 and 6.8. I am not sure what the inside of a Whisper filter
looks like but you might want to try this method. Another bonus is that
this method is silent. I never liked the noise made by the impeller
chopping up the bubbles. Maybe I am just squeamish about constantly
hearing bubbles scream as they are chopped up.
Shawn Ferguson