Here's a picture from my room cam. They look a little burned. I'm not sure if I'm just running a bit hot or need to run sledge hammer through it every once in a while. The run of does come off hot. The ppm is 1.5x to 2x the nutrients. Ph is fine. I've been pouring some RO water over it every once in a while to keep the run off under control.
Damn, those are not just a little burned, you took the flamethrower out.
I guess it's a nutrient Lockout mainly potassium, due to too much salt content. Roots burned so the leaves are following. Way too high ppm runoff tells the same story.
I'd flush with a lot ro water(to get the ton of salts out) and a very little nutrient concentration(to keep the plant alive)
After this they're pretty soaked, give em a day or two dryback to get oxygen to the roots again, depends on how fast the plants dryback, don't let them dry out.
The leaves won't recover, even if the salt buildup is gone, so I'd keep them running with low fertilisation and check the trichomes every other day and pull them a little earlier because the photosynthesis slows down but all should be good and the trichomes milky at least.
For the next runs don't ever just flush with ro/tapwater in Coco, they need some nutrients all the time. Just decrease it and don't overdose the feeding
Hope this helps a little.
