Hello, I am having some problems in my veg cycle. I am using a top drip recirculating system, House and Garden nutes (Aqua Flakes A&B, since it is a recirculating system), and coco fiber as the medium. Everything was going great for about 2 weeks, and now they have stopped growing all together. I thought it might be a calcium or magnesium lock out, so I flushed and added Cal-Mag to the water resovoir. They seemed like they were doing better, but when I checked them out today they look terrible. Most of the yellowing is occurring on the newer leaf sets. Here is a pic. I am at a loss, and any help would be sincerely appreciated. Thank you for your time.