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Do you smoke anything before you go through this process?

Paul Krombholz wrote in the APD:
> Roger Miller wrote:
> .....CO2 is only about 0.03% of "normal" dry air, and water in balance with
> air will contain only about 0.42 mg/l of CO2 at 25C (about 77F).  That
> number drops noticably as temperatures increase.  A concentration of 20
> ppm CO2 is 48 times the atmospheric balance point; it's what the water
> would balance at if the air contained about 1.4% CO2......
> This is a good time for me to give a plug for my method of delivering CO2.
> The air we exhale in normal breathing is between 3 and 4% CO2, which is
> about twice the concentration that would provide 20 PPM.  All one has to do
> is to exhale into a bag and then arrange to pump it into his or her tanks.
> Just sitting here and reading the daily APD is enough time to fill up a bag
> that can get the level up to 30 PPM in a 75 gallon tank.