Todzillaanswered grow question 4 hours ago That leaf in the pic is a lower leaf that had an issue a few weeks ago and is now showing the end of the symptoms. Don’t chase an old issue.
Your new growth looks healthy and has the correct color green, so no current nitrogen deficiency.
As you are in flower your nitrogen should be cut soon and focus more on the PK bloom nutrients.
Keep up the good work and best of luck on your grow.