Yeah, if you use CO2 supplementation, ventilation has to be considered in the equation but if you are venting, you will be sucking the CO2 out. If no venting and your temps are OK, I would be curious what your PPMs are.
I'm seeing impressive size difference coming from feeding every other day last round to feeding three times a day this round. Im sure organic coco will do great but I wouldn't do recirc like me id do DTW. I don't know how well organics keep in a rez. And make sure the led has at least 7 bands. Print out the chlorophyll chart and make sure it activates chlorophyll A from two spectrums and chlorophyll B from two spectrums. Also UV is vital, I wouldn't have the crystals I do without it.
Ya i might go up there tomorrow and talk to them
Over Dose can i use 1 pack and divide it even to do a smaller batch with a smaller bucket....?