Grow tent #1

To properly water/feed coco you need to watch your runoff ec and ph after every water/feed. Keep it within proper ec and ph range for veg/flower for age range. Feed when nutes lowering, flush when rising. Ph going out of whack, then water with proper ph until you get it where it needs to be. Cheers

Sure, coose any lighthours between 18 and 24...... they are recommended to grow under at least 18 Hours of Light. some Growers let them run uner 24 hours but in my opinion, everyone has toget a rest, plants too. So keep on growing

Yes people do it all the time. I suggest only do it if needed. Like an airflow issue or lack of light penetration. Your plants look awesome. Gl on the rest of the grow.

Little nutient burn. Not over the hill. If you use only water your every third watering, all´s good.