should be fun to watch and it is also nice to see it torn down and done right. You see this started as a ghetto grow back in the day and it is now being rebuilt into a 'the correct way to do things grow". Costs a lot of money to do things correct.
Beautiful show.
A few questions if you don't mind.
If you were starting from scratch do you prefer the trays or the Ebb&Gro buckets on planks? On plant count...did you pick this number to stay legal/under fed limits? If that were not the concern do you consider these numbers optimal or would you increase the counts (and if so what do you consider optimal)?
Can you give an idea of your ambient/outdoor conditions (temp and humidity)? I am curious because I wonder if 18000 btu is sufficient given really hot outdoor temps. Really good idea on the ducting. I am curious if the air dumps in a single spot in the room or if ducting the length of the room with different size registers would provide more even cooling?
Good luck with the grow.
Edit...also curious as to the choice of adding perlite to the coco. What do you find the advantage to be.
Right there with Grownerd on the plain coco (and Dongle.) I've got some clones that grew a foot in a week, I'm officially giving up on coco chips, long live coco peat!