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- Dabs of Rosin.
That is correct, in autopots the layer of salt forms and you don't want to disturb it. Any accident can just kill the plant like a time bomb waiting to go off or do a regular flush and prevent it from forming. Every style of growing has potential pitfalls. If my back could lift them Earth box with true living soil is probably the safest way to grow. The guys at Build a Soil have this dialed in.We all agree on runoff, as I prefaced everything, "Unless a good drain-to-waste is done frequently...."
But I still presume that grows can be done without doing any drain-to-waste, such as using AutoPots, bottom-feeding wicking, drip or other controlled-type feeding systems that never allow any back-flow of dissolved salts from deposits at either the top or bottom. I recall back when I used AutoPots, the predominant guidance was to simply not top feed and disturb the salts layer.