Looks like either a Magnesium or Manganese deficiency. Try watering with plain water + 2 tbsp Epsom Salt per gallon of water, make sure your soil/water/runoff pH isn't out of wack, and check out your temps/range of temps.
K thx guys I did the Epson salt feeding how long should I do this, and what am I looking at in recovery time. Ph is ok, temp 77degrees.