Recent content by kc52712

How much fresh air is need in a sealed 3x3x5 grow box with optimum ppm co2 and plenty interior circulation ? Since plants produce o2 as a byproduct of photosynthesis , i am currently building a g/box from an old upright freezer.

i have an upright freezer turning into grow box.have installed a recirculating fan/heater and 4 bulb h/o t5 light.being that unit is sealed would like to do co2 inj. question is,do I need to supply fresh air at all ? have read that plants do not need co2 during dark time.should i open door to...