Discolouring + necrosis?

From one photo I couldnt tell if its leftovers.....But if you had this problem it might very well be you dont see leaves revocer fully. But if it doesnt increase and you have the ph controlled now, it should be fine.

potassium deficiency symptoms. Probably not pH related. You'd see caclium problems before potassium problems and you don't have a bunch of confusing symptoms, they are where they should be located and just potassium from what i can tell. This doesn't gaurantee it isn't lockout or ph-lockout, but helps lean one way or another. in soilless/hydro it's a clean answer... probably need 180-200ppm provided... in soil it's not a one-size-fits all answer due to more variables.. like how much is the soil providing on top of your fertiization? So, ramp it up, but don't go crazy.. try to keep other elements at same concentration and raise K. Make sure it doesn't go the other way over the next few weeks.