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post #11 of (permalink) Old 03-22-2004, 04:31 PM
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Join Date: Nov 2003
Location: Lincoln, NE
Posts: 2,165

I run 2 1gallon bottles on a 20 gallon, and it's about the right amount of CO2 to keep 25ppm. 1 gallon bottle should be good on a 20 gallon

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