It’s +/- 950ppm in distilled. Given some float room for scale accuracy, how well solution is actually stirred/mixed in, yada yada call it 900-1000 ppm. If you’re 1200ish safe to say 200-300 ppm there is tap water? If so, does that mean 200-300 of the 520 ppm is also from same source and other than what’s reasonably expected from the three bags? That would just be a couple hundred ppm of for sure mobile nutrients. Just being frank, but unless I’m way off there I’m not really sure how that could be expected to support what was indeed a flourishing plant.
Off top of my head, I would say that plant looks underwatered. I’m pretty sure burnt tips are also a symptom of underwatering, and everything else there falls in line. Seems a little silly a plant could be underwatered in dwc, this is where I’m lacking an answer and reason I probably seem open ended in my response. I don’t really have an answer, just an opinion of what I’m seeing. I would figure some sort of root issue is what I would look for. Too low of water level, or something damaging roots maybe?
Has @peachfuzz taken a look at this?
That’s part of my problem. During my transition I used a ratio of 2-5-4
