New growth looking pale/ light Green

low quality picture , cant say anything

trace element issues are very, very rare. do you "boost" P and K in flower? this is likely the cause. too much of either can cause light green new growth. other things can cause this, but due to timing and such, seems higher probabilty. you have more info at your hands than what is given in this question. use it. could hold steady and see how it progresses. if it shows any symptoms of p or k tox, you can dial back, take some notes, and avoid it next time for the most part. how we feed is a matter of several weeks or even longer. never think of it as what you did last time or last week. it's amuch larger timeframe that is relevant. the slower and longer it takes to have issues, the closer you are to matching metabolic rate.

Fe deficiency, look at soil ph if is ok and you didnt overfeed them with P,Zn,Mn or Cu use Fe EDDHA orto-orto wich is the faster assimilable form of Fe for plants.

If it is yellowing from edges in and even ish around whole leaf it Is too much might. Yellowing from center and just discoloration here, and there it is a potassium deficiency.

Well, i can't see shit from that picture. Only thing i can go by is your description. Burnt leaf tips usually is caused by nutrient burn (too much nutrients. That can be caused by just simplky giving them too much or feeding too frequently. The other could be from high VPD and your plants transpiring too rapidly and taking up nutrients too fast as a Out of wack VPD can cause a ton of problems that are usually a nutrient situation. Do you know your space's VPD? Do you try to achieve ideal VPD? If not, you should. It's largely over looked by growers. Ideal VPD in veg: Temperature - 78F Humidity - 65% to 70% Approx VPD 0.85 to 0.95 (ideal range) Ideal VPD for flower Temperature - 75F Humidity - 45% to 50% Approx VPD = 1.20 to 1.50 (ideal range)

Check your runoff, I'm going through the same thing and mine was lockout from over fertilization, I had to flush. Currently waiting for it to dry to start feed again. Do you have a ppm meter?