Lots to change IMO
OK, where to start. The #1 problem you have is the growing medium is completely wrong for the type of garden you are doing. Swith to Sunshine #4, and add a little more perlite and worm castings. This is the best mix for run to waste, low profile gardening. The medium you are using is designed to be watered 4-8 times per day, depending on stage and conditions. you will blow through $1000 worth of nutes on one run. Sunshine also has a much higher CEC ratio, so lockout and wild PH swings are much less likely.
Cut your nutes! You are burning those girls up. With nutes and additives you are using keep your ec 1.8-2. Ph is the big problem with your setup cause the rockwool needs a ph of 5.2-5.5 and the rocks need a ph of 5.8-6.2. I would run it at 5.5 and hope for the best.
The couple things I would add nute wise is
Bud Ignitor for 1st 2 weeks of flowering (6-8 ml/gal) and Overdrive for weeks 4-6 (8-10 ml/gal). Well worth the $ imo.
Good luck Brother, it looks like you are well on your way :)
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