I use a controler and keep them at a average of 1450 ppm with a setting of 1500 and a span of 50 .
I have ran it up to 3000 ppm and they did not produce as well as 1450 ppm .
Now one time I use a co2 gen at full on and they damn near died.
When running co2 you need to jack up the auto vent up to 95 d.f.
Not my system is automated with the standard controler well worth they money.
NOW CO2 CAN AND DOES KILL 300 PEOPLE A YEAR. ITS A NO SMELLING HEAVER THAN AIR. Do not use with out a controler in a ceilar (sp) as it can fill up the room and displace Oxygen and n2.
That fizzy stuff expensive , just walking in to a large room jacks up the co2 about 350 ppm .
Note on earth the normal background co2 ppm is about 300 , now in a house with 2-4 people it can get to 400-500
If you exchange the air in the room all the time with a lower flow rate keeping the flow going all the time. Note plants do not uptake co2 at night they make it.
One thing that also helps with using air flow is the cooler temps at night hellp the plant go into a normal blooming sequence when the bloom lighting sequence.12/12
Note if the fuzzy stuff worked people would be screeming about it. Also note there no way to control it. puck it go with the air flow :thumbsup: