dude, I only got thru the first 3 pages so forgive me if someone already addressed this:
You need to hit your plant with your normal feed schedule till there is runoff collect the runoff, check the runoff E.c. If your runoff is alot higher than the initial input like 50% more consider flushing your airpots with 300-500 ppm mabe cal mag only till the runoff is within 100-200 ppm of input. once you do this maintain a lower ppm for a while and observe the plants. If they continue with the same signs, your problem ISNOT what or how your feeding them.
Its a process of elimination, not Dutch no runoff Vs. American Drain to waste.
In my experience, its usually not your feed schedule, its everything else like bugs, unrinsed coco or a zillion other things.
BTW, did you recently uppot your plant b4 they had those wierd leaves. Coco tends to stall plants out when you uppot them. I used to vigorously rinse my coco with a low
cal-mag solution to aviod it.
Even if the coco you use is "clean" I always soak the coco in RO water and check the EC. even a 200-500 ppm of salty coco can mess with the plants like those leaves you showed on the first page.
In the future, when you ask for help, listen to what ppl are telling you instead of trying to justify what you are doing/not doing. I almost didnt respond to this because of the first few pages of you explaining the "Dutch" way of doing things.
Confu