Looks like salting to me too. There's both burn and def symptoms on the same plant.
How much runoff do you get when your nute delivery system is going? In terms of, every time you water, what is the ratio of water in to water running off?
For example, when you are running drip-to-waste, a 10% runoff acts as a constant flush so that anything not used by the plant is constantly being washed out of the medium.
Practically applied, If you pour in a gallon, and nothing comes out (=it is just enough to feed the plant and not flush it), anything that was not used then gets to sit in the medium and possibly react/recombine into molecular substances you DON'T want.
Just a couple ideas to think about.
stinkyattic Reviewed by stinkyattic on . Its Always Something... I think this is a phosphorus deficiency, but I am not totally sure. The edges are crispy and the new small leaves around the buds have yellow, crispy, turned down tips. The guide I read said a little P deficiency in flower is normal, but if P is what it is, I think I have more than a little. What should I do? PPM is 1150, pH is 5.6, double checked with liquid pH kit. They are starting Week 4 tomorrow. The last pic is what I would say is the worst looking one. Rating: 5