MSNL Sour Diesel Auto Plant 2

Day 23 - 2 Days into week 4 and I have been having problems with this plant. I cannot figure out what is wrong with her. At first I thought it was wind burn because she was the closest plant to my fan, but I changed that last week and still no progress. After more research I was thinking there was a flux in ph in my water or a nitrogen deficiency...I use the same water source for all my plants and my 3 others plants have shown no signs of problems with the pH. I added Nutes for the first time yesterday hoping that the nitrogen in the Nutes will help the plant move along.