I think you’re probably right about the trace minerals.
I talked to a buddy on FB’s probiotic soil alliance group and he suggested mixing in some biochar when I add the clay soil. I’ve never needed biochar before, but it’s a perfect fix for most nutrient excesses in the short term (the plants and microbiology will sort out the long term fixes). I’ll be adding it a 7%, by volume, rate to the soil before the next cycle.
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