What should the temp be in the res I am between 70 and 75Espresso--sorry for getting off track here....How is the new growth looking? The leaves that are damaged will not recover, but the new growth should be looking better.
Did you get a chance to check out the roots and the temps of the res? I grow organic in summer because I have trouble keeping the res temps in check and res water that is too warm does not grow white healthy roots.
Originally nutes were at 221 ppm. She upper her nutes to about 400 ppm. You think she needs to cut this by 1/3?You will note that the worst of this nute burn, is of the lower laterals suggesting that it has occurred some time ago, with little if any on the top most of the plant, this suggests that it is a one off
As there is serious necrotic splotches on the dry wrinkled fans, and has not traveled far, a "hard hit". .. that may have passed?
but I still stand by my initial post of flush your rez, and cut back your nutes by 1/3 until you see some positive improvement