Stonerdanswered grow question 4 years ago Make sure you water with runoff and check that runoff pH/EC to determine it's fertility.
To me it seems like pH related issue that shows in multiple deficiencies like Potassium (K) and Magnesium (Mg). Do not change feeding schedule and dosage unless deficiencies persist after pH has been balanced!!
You should adjust your irrigation according to the runoff parameters to balance the pH to about 6.0-6.5.
Hope this helps! Good luck and happy growing :)