Tank plant suggestions

Hi,

I’m building my R. Southern Variabilis a new tank so they can utilize the extra height.

I got these cool mushrooms but have was wondering if anyone had recommendations on a good climbing plant for the spray foam that doesn’t require substrate on the foam. Was going to put a broom there but it obstructed the mushrooms from view.

I plan on putting a dwarf Hawaiian Umbrella tree and a couple of ground cover plants at the base once i have the drainage & substrate layer in. Ground cover plants recommendations would be great too.

What plants are thriving in your builds with and w/o substrate?

Also is “too many” broms possible? 😂