Setting up new Terrarium, this is my second

[homebrewdude]

In my old house I set up a 29gal terrarium for the kids.
Mostly for frogs and stuff, it was split with a water feature.

Kids never got into the frogs, so I planted orchids in it.
They REALLY took off!
I sold the complete tank with plants and made from cash when we moved.

So now I want a dedicated Orchid tank without the water feature.
I am doing 29gal again cause I kept the old LED light from the other tank.

I wanted a false bottom to keep the substrate from soaking in water.
I was thinking of covering this with sphagnum moss to keep the other stuff from falling through.
Bad idea? Is there a better idea?