i have a grow box in my basement.its about 90-95 degrees in there with the fans on.i have curious neighbors and two teenagers.anything that makes noise is out of the question.i ve heard co2 helps,but i have'nt the faintest idea how to make that happen.could i put a cup of ice in there every so often?i've been an avid gardener for many moons,but never indoors.i need passive solutions.for gods sake i need help before summer really hits.
