Ran shirt off water - had to desperately warm it on pavement in full sun, prior to feeding to abate possible shock -- nailed the 72.xx* I was seeking! Got a poop/microbe tea (broke-ass style). Seemed to help immensely. Backed down to 700 tops ppm and see where that takes us. I've been supplementing langbeinite for possible K & S issues and what does extra Mg hurt? I read that these issues arise as a lockout due to abundance of Ca, which may be possible.. either way. I added approximately 50ppm/Gal feed today, so I'll know by next update if I'm striding in the correct correction direction.
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Happy healthy and prosperous growing!!