Hi, I took as many pictures as I figures would be necessary to see the yellowing of new growth (It's growing yellow, not turning yellow). Also you can see the internodes space is getting quite small, which leads me to believe it's a zinc deficiency from what I have read. The leaves do eventually start to green up as they get larger. I am using a DWC and I have cut back the nutrients to 1/2 strength I was using to veg even though I flipped to 12/12 a few days ago. This problem was happening before I flipped (about a week now). I am thinking of just using straight PH'd water in the buckets for a day or two to flush and then resuming at 1/2 strength nutrients for a week. Would that be long enough or too long to flush? I can post more details if needed but for now here's the pictures. Thanks for taking a look.