Maybe try to fill troubleshooting form to get a proper help?
For nuteburn as an idea, you can use distilled or deionized water only or you can mix it with tap water, that will lower the nutrient absorbency. After you see the new healthy leaves, you can start giving back normal water.
tevfik Reviewed by tevfik on . Leafs a "crispy" feeling? INFO: Strain: Bubba Kush (Bubble gum x OGkush) but not how long they last. NO extra ANYTHING given to the plant. Plant: 5 weeks into veg (approx.). Height is approx 4.5-5inches tall. Problem: Some of the older leafs are crispy feeling? What could be the cause? Is the run-off water being yellow related?(or is that also another problem or nothing to worry about?) Rating: 5