I keep my fans running 24-7 one near floor to keep the co2 moving it sinks towards the floor keeping the fans running helps with the extra moisture after the lights go off and temps drop I run my co2 between 800 and 1100 but it depends on how much light you have if they can take advantage of the co2 weak lighting use less co2 but I noticed far better growth at 1100 vs 600-800 I only dump the air/co2 at night right after lights out plants can't use the co2 then anyway
Good point!.. CO2 is heavy.
@Xsan, you'll want to hang that Ares burner as high as recommend. I think it's 20 inches clearance from the top of the generator to the ceiling. I have 2, 24 inch industrial fans on swing, and a 10" hyperfan running on the floor in one corner, pointing to the opposite corner. This keeps the CO2 circulating as it floats down, and then gets pushed back up by the Hyperfan, and then the 24" fans spit it back out on top of the plants again. I didn't do the floor fan at first, but then I got an AirROS (H203 generator), and H203 is heavy too, and AirROS recommended the floor fan.