sorry didn’t see the temp….
I’m a little late to the game … STOP BK ! maybe I missed it but what’s your slurries ? Seems the ppm is low you can feed it at 6.3 , 6.4 or what ever .. but need to know the slurries and take it from there , if you keep giving BK your gonna see discoloration, leaf’s twist and then crisp leafs .. as I use RO , fullon is great for adding minerals back in … but I’m willing to bet thpat the slurries ppm is way to low and you should be at a minimum 300 ppms and keep between 300-600 ppms and I bet your ph is high too … under LEDs these plants will eat that nectar nutrients up and add BK to it she a eating monster ….