CO2 and the fermentation

[chunmak]

Have u ever made a co2 system for the plants in ur aquarium? because u might know that most of them use yeast, sugar and water to make the CO2 so i was thinking would it be a good idea to make beer or cyder instead because the by-product is the same CO2. whats ur opinion?

 

[Bol]

Just a guess, but probably not.

For one thing, I'm going to guess that when making beer, you outgas more than just CO2.

For another, thinking back (I used to brew a fair amount back in the day), I don't remember beer making producing that much gas.

Lastly, you use a different type of yeast to make beer; not sure if that makes a difference.