Hey guys and gals! Ive been growing for over a year and have had my growing pains if you know what I mean. I have learned one huge thing that made more difference than anything. I thought Id share it with you. I have a 5'x5' grow space with an 80 cfm exhaust fan for ventilation. I have a vent providing fresh air to replace what is exhausted through the ceiling. My plants from last grow did not yield like the stated amount from the seed manufacturer. Im talking not even close! I just assumed its because I'm a newbie and that did prob have alot to do with it. I was doing ok...plants looked good and healthy.....just small. Mid grow this month I added an additional exhaust fan and ran one of them all the time and the other runs on for 30 mins and then off for 30. HOLY SHIT! I found my limiting factor that was holding me back. All three plants grew 2 inches in the first 3 days. I normally got about an inch a week. Im 4 weeks into flowering now and Im confident Ill have yields close to what is stated. I just assumed I was giving the plants enough c02. I guess the more mature they got the more they needed and I wasn't giving it to them. 2 plants are in pro mix and one is bucket dwc. Grow lights are 2-300 watt LED with 3 125 watt cfl's to supplement. Plants are a Royal Queen critical, Blue kush, and atomical haze. Using advanced nutrients 3 part Micro,grow, bloom. Im enjoying the experience and love figuring out all the little things that make so much of a difference.