Looks rough but not the end of the world! I recommend keeping your PH between 5.5-6.5, but more specifically 5.75-.6.2ish. If you stay too low or too high you will have lockout of nutrients and deficiencies. The feed looks pretty good, at least you shouldn't have any deficiencies with it as long as your environment is in order. I recommend changing out your reservoir if you haven't, giving them a nice low dosage of nutrients with a PH of 5.8-6.0, and keeping your tent cool. You already raised your light which is great! The damaged leaves aren't going to recover and she got so messed up you want to reduce the stress for the rest of the grow. 🙏👊