Here's an update on the tank. The anacharis is growing more extensions, I added a subulata and I added another filter from a vacant tank in hopes to lessen the size and number of water changes for my neighbor has to do while I am away. It seems to be working, so maybe I'll keep it until I use the other tank. I also modified the barrier so that it will still keep most of the tank's surface calm, and keep duckweed from leaking around the edges of the barrier, being sucked into the turbulence, and being pulled into the filter or just swirling around. I did that by extending the edge of the barrier while keeping part of it opened to fit around the lip of the tank.
I'm also thinking of adding wisteria and possibly neon tetras or black skirt tetras in addition to the moss wall when I get back.