Should I remove yellow leaves? I under fed nutes and my ppm in tap water were too high, using distilled now, wait till after recharge or jus remove leaves?

Its upto you my friend :) If you are wanting to keep her on an extra few weeks then I would advice giving her one dose of N that should clear up all the yellow and it should be enough to finish her up for the whole grow but if you wanna remove the yellow leaves thats fine because they are yellow the plant has already used them for nutrients so they are just gunna shrival up and die and cause hiding spots for little nasty bugs so yeah better remove them if you intend of cropping soon if not then dose her up :)

Yes Dills. Take those leaves off now, less work in the harvest. Cheers