I am growing 3 tomato plants indoors in a 2x2 tent along with some herbs. I have been experiencing some health issues with my tomatoes. The leaves curl and are very dry and brittle. The also sometimes have yellow spots. It seems to only effect older leaves on the plant. These plants are approximately 6 weeks old and are in fox farms of soil, being fed fox farms nutes. I have been fairly light on the Nutes so far. My grow room stays around 72-75 at night and 80-82 with lights on. Humidity fluctuates between 35 and 45%. The light is a 200 watt actual cob led that is nowhere near close enough to be burning the plants. Am I doing something wrong? Is this some sort of deficiency? Could it be too low of humidity? Do I have yellow leaf curl virus? Some sort of wilt? Thank you for your help.