Sorry, broms are bromeliads. A plant that is included in most pdf tanks. Some species use the cup in the middle of the brom as an egg laying and tadpole rearing sight. That do well in humid environments, and the right type with the right light color up nicely in shades of red, pink, black, etc. The main type that we use is grown without soil, but there are types that grow in soil as well, but they tend to be too large for a small vivarium.
I made a journal, including tracking costs when I setup my vivarium, it was for fire belly toads originally, but I am making a few changes to get it ready for pdfs. It can be found here:
Construction Journal for 39 gal paladarium.
Wow, it has really grown in since then, and the broms on the left had to be moved because their roots were getting too wet.
This is not the only to make it, mearly my choices, there are many different ways to make them. I have come to find out most people do not put leca, expanded clay pellets, on top of the false bottom, they just start with the substrate. But I have not had any problems and the humidity stays high with two water features.