Please Help

The plants look good. But here are my ideas: I think the pots, especially only partially filled with soil, are going to be small as the plants get bigger so I would start thinking about moving to larger pots or putting them into the ground. The lower leaves look like they are getting lighter in color. It might be time to add some nutrients, especially some nitrogen. Also, the plant in back looks like it might have some spots on the leaves. I can't see well enough to tell if it is the start of a Cal/Mag deficiency or just normal spots.