Re: CO2 DIY idea

["Giancarlo Podio" <gp at isaconsulting_com>]

I can't stop thinking about potential sources, I wonder if my in-laws would
mind being tubed up to the tank? ;-)

I had never seen that article before, very interesting. Makes me think of
all that CO2 that is in the blow-up mattress in my living room, it took me
an hour to fill that thing up! Are there any substances we release while
breathing that could pose any problems? Does CO2 in the bag remain unchanged
over time? (another words, if I were to deflate my mattress after a week or
so, would the CO2 and other elements be the same as the first day?

Thanks
Giancarlo Podio

----- Original Message -----
  a.. To: Aquatic-Plants at actwin_com
  b.. Subject: Re: Aquatic Plants Digest V6 #173
  c.. From: Paul Krombholz <krombhol at teclink_net>
  d.. Date: Tue, 27 May 2003 14:55:38 -0500
  e.. In-reply-to: <200305271103_h4RB3nQp028654 at otter.actwin.com>
  f.. References: <200305271103_h4RB3nQp028654 at otter.actwin.com>

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It takes me about 4 minutes to fill up a plastic garbage bag that can supply
three fifteen gallon tanks or one seventy five gallon tank for two days. It
takes about 45 minutes to pump all the air out of the garbage bag into the
tank or tanks. With a tight fitting glass cover, the supply of CO2 is good
for about two days. See the Krib,
http://www.thekrib.com/Plants/CO2/mouth.html for a diagram of the
arrangement for pumping the air out of the garbage bag.

I have read that a resting person produces as much heat energy as a 100 watt
bulb. That sounds like it is in the same ballpark as the candle, although,
with the candle, you probably could get a higher percentage of CO2.
Actually, even 1% CO2 still works pretty well, and in ordinary breathing,
people put out 3.5 to 4.0% CO2. I get CO2 levels between 20 and 25 PPM in my
tanks right after pumping the air from the bag in.