setting up co2

im thinking of buying a co2 injection set up. i was looking at the hydro farm kit and using a ppm3 control from CAP. does any one use this set up or anyting close to it?

Check out the Co2 emitters, those things look pretty sweet

I actually just got a co2 system set up in my DWC box. I'm not too sure how i should run it yet, just experimenting with it. Currently when i'm home, i'll turn off the fans and inject it with around 1200 ppm for around 30-45 mins. I try and do that about twice a day. My plants have been showing huge signs of improvement since i just transplanted them from soil to DWC and their about 8 inches tall. Just topped one of my plants on all 4 of its top branches so we'll see how the co2 helps promote that growth. I've had the plants in there for 2 days, but i'm thinking about switching them over to 12/12 tonight since they are almost half the size of my box. Any thoughts/suggestions