Yes it does work but loose the airstone just 1/4 line first put a layer of LANDSCAPE FELT then a layer 1-2 " lava rock (Its what I have in my yard so it is free) then a layer of LANDSCAPE CLOTH then mix your soil 50-50 with cinder rock (Fine lava) for all this work it only yields a bit more growth but really not worth the work. also you need to water often it does dry the soil. I did not have a problem with that I get 120" of rain a year, and just set it outside of my green house. Better to use co2 I ran my dryer vent hose into my green house WOW what a difference and it sure makes one want to do laundry daily lol Happy growing