i can figure out how to calculate, roughly the amount of air displacement required for this space. but can i simply run, say, a 6" duct from the attic (vented), to the bottom of the space.

and will this venting low help at all with keeping the space cool. i figured i would have to run round flexable duct someplace close to the HID light source.

anyway, let me know what you think about this

and p.s no pics tonight, had to charge my batteries.

Nutes i added for tomorrows watering (all photographed above) used at less than 1/2 strength :

1) FloraNova Grow
2) Flora Blend Compost Tea
3) Humboldt Roots Nutes
4) and a slight touch of the myco madness

Please let me know if i've totally fucked up because I haven't used this mix to water the large plant.

p.s.