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Old 01-23-2008, 08:01 AM   #176 (permalink)
ishar
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Join Date: Jul 2007
Location: Hamilton, ON.
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I am not entirely sure, but I don't think it would help. If you upped your lighting then maybe, yes it would be useful, but at .5 wpg on a 40G I don't think CO2 will help you out much.
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