Very nice! They seem very happy. What temperature range do they get there?
They look happy! It's kind of difficult to tell how big the bicolor one is, though. No side-by-side?
Mounting seems like a good idea. I've not been able to grow these.
Dot, try perlite and a little coir topped with live moss. About 95% perlite. Let them dry a bit before watering. Lots of light seems beneficial.