I think you should replace the dracena marginata, they get way too big and I think it would be too wet in there for it anyway.
Some ficus pumila would be good in there and would grow up and soften the background nicely.
Also if you want to grow nice moss, strong lighting is very important.
Some ficus pumila would be good in there and would grow up and soften the background nicely.
Also if you want to grow nice moss, strong lighting is very important.