CO2 really helped!
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I added CO2 a couple of months ago and my harvest has increased from 12oz. every three weeks to over 16oz.
The buds are super dense and the steams are thicker.
It's obvious that CO2 was a limiting factor in my flower room. I'm running two 1000W HPS and three (14 site) Aero/NFT systems in a 7X8' closet.
I run the CO2 every two hours for 15 minutes. I adjusted the flow according to the formula in this sticky.
I also measured the CO2 in my room with a CO2 testing Syringe. It took about 10 syringes to dial it in. It's still never right on though.
The calculator in the sticky link really works. But all it does is tell you how much gas it takes to fill your room. It doesn't take into account how much the plants use or any air leaks.
It's not a big deal you just have to use a testing syringe every couple of hours to figure it out. Those little bastards are expensive though!
After a couple of months I've realized that a CO2 sensor/controller is a must. CO2 may be a waste if you don't have lots of light and other limiting factors but if everything is dialed in, watch out! You will see amazing results that more than pay for the costs.
The good news is I found a great deal on fleabay a couple of days ago! A complete greenhouse controller with CO2 monitor/regulator. It will take care of all my fans, lights, humidity, temp and CO2 all in one box. I'm stoked!
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