Exotic Genetix Chromatose in Living Soil

These plants are doing well for the most part! The middle plant did not like being left for a couple days without water. I think the tent must have gotten hot, or something else happened because the center plant immediately showed yellow leaves, and a dark almost black pattern on some of the leaves. Doesnt look similar to any deficiencies, not 100% sure why only that plant displayed this either. I watered very heavily when I returned to try to bounce her back. Other two plants seem happy. Starting to see swelling of the buds and some trichome production on the fan leaves. They are starting to smell better every day. Super earthy, hashy smelling plant. They seem to have stopped stretching so I hope all their energy will go towards buds now!