I took them out today and added some nice rich soil from the local park, it's about 6 inches deep now. I watered and went to work for 6 hours and just now when I got back the leaves are very noticeably bigger, they're loving it.

I hadn't planned on transplanting. At this point I'm planning to apply LST that I've been reading up on and try to grow them horizontally.
By adding a screen are you referring to Scrog? I'll look up some info on that..
I'll be adding more lighting as my budget permits, and yes there's about 10 drainage holes on the bottom of the tub.

new picture: