I use co2 tank injections and co2 generators.Its not real difficult but has to be planned out. Gro your kinda off though.as you want a fan on inside always to circulate the co2 inside the grow area.I use tilting fans on the floor blowing up on low.That sucks the fallen co2 from down low and recirculates it around your plants.I do my injection then very 2nd hour 3 minutes before a fresh co2 injection I have my exhuast and inlet fans kick on for 3 minutes then they shut off and the dampers fall closed closeing the vents. I got the stale air out fresh air in and new co2 filling the room.You need timers tanks,hoses,dampers,fans,co2 level monitors and solenoids for most injection setups.With generators you need a timer,propane tank or natural gas hook up, and then your standard fans and dampers.Temps for co2 are bests around 80-85 F. Co2 works great with T5 lamps.My buddy owns a hydro store and uses co2 tanks in the 4x8 grow huts with T5s with awesome reults.Keep ppm levels at least 1200 ppm in the grow are to get results or your actually not doing too much to help. Done right yields can increase up to 80% and decrease grow times by 2 or more weeks.
