There is a segment on CO2 at http://www.akca.org/ search for CO2 and it will
take you to a page on water quality. It gives no numbers, but describes the
effect on pH and how to control CO2 levels.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html
"JGW" wrote in message
...
Does anybody have a sense of what an acceptable range for pond water
C02 levels is? I checked all the pond water chemistry web pages I
could find and couldn't find any guidelines.

Thanks.

Joan
_______________