Another inspirational set up! Very well done!! If you are a bit worried about the left side not getting the water the moss need, just get one of those tiny nano or pico powerheads and connect with a small fexible or hard tubes to the top, to get that area wet... Lovely!
So you _added_ duckweed to speed up the nitrogen cycle though you don't like it? How do you get rid of it at a later stage then? I find it impossible to eliminate once it gets in.
Duckweed is indeed hard to get rid of! However, I noticed that once other floating plants become established, duckweed eventually begins to disappear. It also doesn't like flow
