Please help I’m at a loss as to what is wrong with plants.

dirtydoper1991 said:

Do a soil slurry test and report back. in my opinion its vital to monitor ec/ph in/out. the plant will tell you alot.

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It's not vital to monitor what comes out. Take care of what goes in and grow healthy plants. Fiddling around testing runoff leads people down a rabbit hole in many cases and they end up doing more harm than good. It's a damn plant. Why do so many make it seem so difficult and overcomplicate things?

Just an update. After extensive research and trying shit I found it was just cuz I didn’t rinse or buffer my coco. Like I said I had never used it and clearly didn’t look into it well enough. I have flushed all 30 plants excessively with cal mag low nute water for 3 days and no hey all look healthy now. Also got fungus gnats prolly for the same reason but was able to fix that as well. Letting everything chill for another 2 weeks then ima flower them. Thank everyone