"Lemme Grow Again" Fast Buds - Northern Lights Auto

what you highlight in first picture here is a harmless leaf mutation. Do keep an eye on that pailing of top set of leaves. It is odd to paill from inner to outer portion of leaf. This could be low Fe or low S, but i'd wait to see how it progresses. reference a leaf chart as you continue to observe it. Very unlikely it is a trace element issue in soil, so low S is best bet at this point.

Yes, this is N toxicity. You got nutrient waste salts inside your soil. You need to flush them out. And in the future water till runoff to prevent this problem for the rest of the grow. For the flush you give the pot volume in water with pH 6.2 without nutrients. For the runoff you want 10% from the water that you give to drain from the bottom of the pot.