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CO2 "bubbles"

Jefferson Ong wrote:
>Subject: Re:  DIY Yeast reactor
>I was reading the post & someone mentioned that CO2  can  have an effect on
>moderately hard water.   How do they affect the water???  I thought they
>just gave bubbles.   Do they alter PH or hardness???

Please don't take this unkindly but you shouldn't be thinking about adding
CO2 to a tank until you know more about it. Are you thinking of "air"
bubbles -- like from an air stone? Those are adding oxygen to the water and
will drive off CO2. CO2 is short for Carbon dioxide. Carbon dioxide is good
plant fertilizer but too much of it will kill your fish. And yes it will
lower pH.

in Vancouver where it is alternately rainy & sunny but quite warm