Got much much worse after feeding with P unfortunately. This is a kind soil grow, so up until the defc, I was not feeding anything really. Just recharge, superthrive, and carbs for SC2 and SS2. Just dechlorinated tap water for SS3. All water and water/nutes have been ph'd to 6.2 to 6.8 prior to this issue. Based on the feedback in the infirmary, I Ph'd water on the 6th at 6.0. Yesterday their water was Ph'd to 6.5.What are you feeding? I'm no expert but that looks P def. to me.
To offset the P defc, I did 2 feeds with AN Overdrive, with some CalMag on the side. Seems like SS3 didn't like the extra N in the calmag.