So i got an insulated shed im using for my flower room . Im running 2 hps 1k air cooled hoods uour basic set up . My question is if im exhausting air with inline fans and imcoming is there an option to increase co2 with those mushroom bags etc. Im exhausting air so it wouldnt build up in the air id imagine at all is there something i can do other then having an enclosed room . I was thinking of just putting 2 of those mushroom bags in the room every few months think their good for but then again the rooms like 14 ft long 10 wide 11 high. Thats alot of space to fill with co2 i imagine and if im exhausting air itd be pointless? Is there something else i can do tonadd more co2 rather then from fresh air etc.