So it looks like its more towards the bottom of the growth, however, there are some signs of deficiency that stems from the middle of the main stem. It looks like MG deficiency, so I added tsp / gallon epsom salt my last watering, which was 2 days ago. I just wanted to make sure that it was the correct diagnosis. Also, It looks like my other plant has some calcium deficiency, which is odd because I have added dolomite lime to my medium (2 tbls/gallon).