Had some deficiency (or perhaps lockout) show up but it seems to have resolved after last res. change. I have been (mostly) spot on with pH, so I think it may be Megacrop (1 part) issues. I'm havering to use such small amounts (1.5 tsp for 3 gallon reservoir to hit approx. 750 ppm including 3 ml of CalMag) that I'm getting inconsistent amounts as MC doesn't seem to be well mixed or the components uniformly distributed. Looking at Jack's 321 on the next run.
In any event, buds are swelling somewhat and getting frosty:
In any event, buds are swelling somewhat and getting frosty: