05-29-2012, 01:20 PM
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I moved this thread to the aquarium plants forum- you're more likely to get a response here.
I know that CO2 will convert to carbonic acid in the water, which tends to lower PH... If the hardness is high however, the CO2's impact on ph will be less.
Many aquariums rely on the CO2 produced by the fish and substrate- it produced plenty for most of our needs. (We use what's called 'Low Tech'.)
Yeast CO2 is never worth the effort IMO. Pressurized can be, if you want to use high light, fertilise daily, and trim your jungle twice a week.
Last edited by redchigh; 05-29-2012 at 01:23 PM..