You don't need to control the amount being dispensed because it's a steady, constant release of Co2.. it's not going to fill your room up but if you run it directly to your plants it works great.. it depends on what size your room is really.. for my area which is 6x6 it's great.
I tried those Exhale bags and didn't see the same results as I have been seeing with Co2Boost.. it's just a mushroom kit in a bag labeled as a Co2 generator, lame. I'm sure they are producing some Co2, but the boost bucket comes with a pump and hose system and I think that makes a huge...