The way the serrations on the edges of the leaves look pale makes me think micronutrient def/lockout.
HAve you tried bringing your pH down to 6.8 with just a splash of cider vinegar in your nute mix?
stinkyattic Reviewed by stinkyattic on . Mild leaf discoloration Plant is growing great but its got yellow edges check it out I think it is mild burn. I flushed it a few days ago what y'all think? Rating: 5