Hello jwyckoff,
1. What
nutrients (and/or additives) are you using?
2. How w much are you using?
3. What is the pH?
4. How often do you change your
nutrient solution?
5. What is the total water volume?
6. How much water are the plants drinking daily?
7. How old are the plants?
8. Is the condition on all of the leaves including the new leaves, or just the older leaves?
9. What does the underneath side of the leaves look like?
10, Do you see any tiny insects around the plants, especially white fly's?