What might this be? Any thoughts?

[GeneralMarven]

Any help would be appreciated. Is this anything I should worry about? I usually give about a cap full of cal mag every other watering and a tea spoon of fox farm cultivation nation veggie nutrients. Nothing crazy

 

[TripsRabbit]

Looks like the start of a potassium deficiency. You should do something crazy, like buy some cannabis nutrients follow the directions on the bottle.