agreed. that one element can cause so many other symptoms and send you chasing tail. at this point, it's the first thing i look at. check notes and see what ratio my last mix-up had, and adjust accordingly. LEDs really fucked up my system, too. the learning curve was not kind.
It's fouling up uptake of the element the green arrow is pointing to. If you ever forget, remember that calcium pretty much can foul up the uptake of everything else, and everything points away from calcium.
I have about 30 ppm of Ca in my water, according to the water company's analysis. That amount prevents me from adding any additional Ca in soil, or I get lockout by sometime in mid-flower. I need to buy an RO filter, even for soil.
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