My pen died on me about a week ago as I moved into a deficiency.Im 5 weeks from 12/12 I believe I have lack of nitro. My leaf have yellow but have moved to also getting redish spots. I have done a 2 day flush of fresh ph'd water using a liquid ph kit for now I did a fresh mix both day's. I then mixed a fresh mix of nutes that should be in the range I want from the recipe I use on this strain. I dont expect to see changes if I do for a week or so. I have never had the yellowing before and want to make sure what it is. Thanks guys and gals.