I found this thread from a link on the POTM thread, and I cannot tell you how impressed I am. The cork work is great, and with the plants filling it in -- you've really achieved that "other world" look. There can be only one response: :worthy:
I'm about to set up a 20-long, too, and your experiences are an inspiration. Maybe you already posted this and I forgot, but are you using CO2 in this set up?