CBD Blue Shark mainline

These were finally starting to look ok, but I was also seeing strange lines in the leaves and the beginning of some bleaching or striping in the veins and in between the veins in the leaves. Usually symmetrical, but in various places of the plants. At this point a couple plants were already starting to look like the strong ones. At this point I had my old 1000w HPS my exhaust fan and carbon filter set up and I'd cut a passive exhaust hole so I had negative pressure in the grow tent, which I like. I got a little turbo fan and was pretty happy about the humidity which was consistently staying around 50%. I was noticing that there were light colored bands or stripes between a lot of the veins of the leaves and some of the lower leaves were turning yellow. It reminded me of leaves going yellow during harvest. I started keeping a closer eye on my runoff pH and used apple cider vinegar as a natural way to adjust it before getting pH up and pH down from the store.