Post-Pesticide? Cal-Mag?

I have been battling the same deficiency forever and nothing I've tried has worked. I've got multiple strains in soil, and have changed the soil and the food. The environment is good and they're under 400 watts MH in veg. PH soil test, phosphorus, potassium, and nitrogen are all perfect.

BUT some new plants coming in have overnight done the same thing as all my old plants have been doing for months. They were treated for root aphids that they came in with, with Adonis/Merit 75. This happened to them instantly after that, so I've narrowed down the issue to either the treatment or the aphids. Either way, what do you think I do to make it right? In the past few months on other strains, I've tried

1. reinnoculating the soil w bennies in powder form watered in
2. different food regime (have ppm meter, it's all 700-1000 and nutrient levels are good)
3. changed out soil
4. flushed
5. compost tea

I need a new idea. It may continue for a bit because the Adonis is systemic but if there's anything I can do to get it out, I'd like to at this point.

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