lol, sounds like u really love your plants mate , but (correct me if im wrong) i do think plants absorb C02 only during light hours and absorb only O2 at night,,, so if my assumptions are correct your plants may not be really benefiting from this during the dark period (other than stealing the oxygen you breathe lol) . This being said your plants may benefit from this when the lights come on, thus using the excess Co2 floating around and absorbing it...