with the chlorosis, K deficiency.
damage around the tips with intervienal chlorosis... it's one of the more obvious symptoms to diagnose.
A deficiency can be caused by 1 of three things. pH inhibiting it, another nute's concentration inhibiting it or simply not enough provided of that particular nutrient molecule. The first 2 causes often coem with other symptoms, but not always. e.g. pH will fuck with Ca before it causes problems with K, so you'd see more than one type of symptom with that sort of issue, more often than not. relatively easy to eliminate possibilities....