1st LED grow, 2nd grow ever! RQS Auto's

Sherbet is getting better and better, girls got feed with Sugar Royal and Pure Zyme and seem to like it alot also the UV light got them to frost a little. Got myself a EC/PPM pen, another thermometer with humidity check. The box doesnt yet have any ventilation besides all the openings in the box open and mixing fan inside pointing up and hanging just above the LED panel and UV fluo light to get the got air to the roof vent hole. Next week Im geting them some exhaust fan and carbon filter. They got a slight nute burn or reminesence of light stress hard to tell but its not getting worse just about 1-2mm on the leaf tips here and there... Next week Im introducing Green Sensation booster from Plagron. :EDIT: TIL about bud pinching or so called back-building technique and decided to give it a try on the Sherbet Queen Auto, if she reacts good to this experiment I will go on and bud pinch the other two girls. Suposedly it should make the buds grow dense and fat.