I have a 720cfm in my 4.3 cubic meter room, so I'm a little bit less than you on the air movement. My temperature at canopy level doesn't get above 67F though. Do you think the leaf curl is a heat issue? I will take some more photos later to illustrate it better. I am considering adding a 177cfm booster - I have one that is not in use.
Unfortunately 4'6" is my max height. It is a custom built chamber in a loft you see. The extraction is up at the very top of the space.
What light are you running in your 5' space?
Cheers
The 5ft space can only take 250 CFL. Even another 150 CFL will over drive the tent.
67F ???? What are you worried about, again?
Leaf curl and 67F don't go together, I don't think.
You are good to 90 F at the canopy. I typically run max 86-90 @ 36% RH in the summer for bloom with 1000w water cooled HPS.
Leaf curl? Well the pics were many pages back. There are several thing that can cause it, and several expression of leaf curl, but it is quite specific. You just have to eliminate them one by one.
It is very true, the way all science works is the opposite of common wisdom.
In science, (and this might be surprising to some) we RULE IT OUT, RUTHLESSLY,
So, you would rule out, excess nitrogen and all other reasons for curl. I already ruled out heat, if you are only at 67F.
People believe common wisdom, but science doesn't even believe science. Actual science is the constant challenge of the Current Understanding, in all respects. It is heavy handed, non-emotional, and any result you hand in, must be repeatable by your own peers you are racing for Career. Only they can say you won one.
Only your peers can say you have ruled out all but your Hypothesis....for now.
“Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.”
Sir Arthur Conan Doyle Sr.