Nah ure right bro. They build up salts quick and it leads to lock out but if you cut back on the ppms like you said, the plant will consume it and leave nothing behind. What id do with autopots is run them on lower ppms, then clear the res and run a flush through them for a day, at the end of the week or every two weeks. That should prevent build up for sure. I’ve ran into some foxtailing on my brucey. I spotted it like a week late sadly because I’ve been too busy, but raised my lights. I would love to pop a blackstrap auto, I need to get my hands on some beans somehow. After I seen yours it has been stuck in my “Strains I need to grow” bank lol