The non-green plants like the cabomba furcata and pogostemon look great against it. But it could be difficult to have good contrast while not overpowering the scape with reds.When the plants get taller, I’ll take some photos to show what I’m seeing. Not every plant has a contrast issue, but I could probably try to shade it a bit more to have it look darker. I see why they go with darker mosses most of the time.
I don't have a suggestion, I have tried lighter plants on a background and haven't made it work for me before. But if anyone can figure it out, it's you




