The bottom searated leaves wouldn't be yellowing and dying naturally this early...usually not for a couple months. It's some other factor. At this early stage I would say too much water? If I understand the thread, you are not giving them nutes yet....they are not stretching and they look full, so light is probably not an issue at this point.

To be honest I've only done outdoor grows, so I'm not familiar with the differences between the two growing styles, but plants are still plants.

I've been lurking this site for a few weeks, reading the threads, and learning from you and all the others here who have been so generous to document their experiences and help me as I plan my first indoor grow. All the parts & pieces for my room are in the mail and I should be up and running by next weekend. When it's closer to planting, I'll start a thread too (and not hijack yours!! haha, jk deepsix)

I hope your babies get better soon. Hopefully you'll get some better pointers from someone here who had already been through your dilema and knows exactly what the problem is.