too much air movement problem for CO2 uptake?
 

I heard somewhere that too much air movement is detrimental to CO2 capture. Not sure whether this is true or not, and if it is, what is "too much" air movement.

In my new mini-GH, I have an oscillating fan, which may be on the strong side. As a stop-gap measure, I put some sticky tape over the back grille, but will get a potentiometer/dimmer to reduce the strength of the fan. Obviously, if plant parts get ripped off, it's too strong. I also know the "gentle swaying" guideline. Given that the strength of the fan decreases with distance, I wonder how strong is tolerable for the close plants, while still providing sufficient movement for the far plants. Any thoughts, approximations, tests?

I cannot see how that could be true, but you're looking for "tumbling, buoyant air", not a hurricane.

I think you should worry more about an astroid hitting the earth than your orchids not getting enough CO2. The first is much more likely. Orchids definately appreciate good air movement but not a wind tunnel.

I wouldn't worry about that honestly.

Thanks for the reality check. Sounded a bit hoaky to me, too, but just wanted to get some second opinion.

You probably read this in relation to CO2 enhancement as practiced by some hydro enthusiasts; it applies more to nutrient film or trickle hydroponic systems with regard to nutrient uptake by roots, & doesn't relate so much to gasses.