I'm pretty sure you were right about the over watering, as they look better and less droopy today. However, the leaves are starting to turn yellow now. I don't have a pH meter yet but I am getting one next week. I know that I need to measure the pH but I had the plants in some mild seed starter soil inside of coconut fiber cups and they grew out of the cups and needed to be transplanted much sooner than I had expected.
Here are some pictures of the plants today.
Attachment 291621Attachment 291622Attachment 291623Attachment 291624Attachment 291625