Seal the box itself, ditch the airflow, and have a purge/refill system. If you want to maximize CO2 usage, you will need those temps inside to rise and allow the plants to have a good high level of CO2, around 1000-1500 PPM, as the increased transpiration and respiration will do the rest.

Remember to feed CO2 from the top as it drops.
khyberkitsune Reviewed by khyberkitsune on . THE ONLY CABINET YOU"LL EVER NEED!!! Hello everyone, I have been growing for some time now and wanted to share my semi-homemade cabinet with everyone out there in cyber world. I have had great success with this design/ setup achieving better results with each grows. There is always room for improvement though... So I was wondering if y'all would be able to offer some constructive input into design/ best strains for this setup/ etc. Cabinet specs: Ikea cabinet to match the rest of bedroom furniture Height 96? Width 40? Rating: 5