Thanks for replying!
This is the first time I've used CO2.
I'm really worried about the heat build up. I was under the understanding that hours at high temp would induce heat stress. Should I just keep the recirc fan going and turn off the other fans?
I can't afford a CO2 meter/regulator.





This is why I like this place......WISDOM!
Boris99 Reviewed by Boris99 on . Homemade growbox Hello Mr. Obvious.....Long time reader.....First time poster... This is my first grow in a LONG time. My grow box is a homemade from plywood with dims of 8ft X 4ft X 4ft. Ventilation consists of 4 24VDC electronic fans, 1 stand alone fan and a small exhaust fan with a built in carbon filter. Cabinet is subdivided into a Veg chamber and a Flower chamber. Lights - Veg...150W CFL Flower....400 W HPS Nutes - MG in very sparse quantities plus good ole Superthrive! All plants have been Rating: 5