by pravenj on 7/12/16, 12:42 AM with 1 comments
by thatcat on 7/12/16, 1:24 AM
Mushrooms expel CO2 and intake O2; there are several products such as [0] but you could just as easily grow some edible mushrooms to raise CO2 within the enclosure.
[0] http://www.planetnatural.com/product/exhale-co2-bags/