First Tent, bag seed test!

The Durban Poison is showing some color change in its lower leaves. Im thinking this is a nutrient burn from to much nitrogen. Would that be everyone elses conclusion?

Plants are looking very sad. Wilting quite a bit not just the leaves but some stems as well. Thinking root rot. I do a pretty good job of waiting for the soil to dry and signs of dehydration. So i didnt think it would be from overwatering. Thinking fungus gnat larvae?