Nano fish compatability

[GodFan]

Hey so I consider myself a nano expert but this one has got me stumped. I am considering setting up a paladarium in my 20 tall and I want to keep vampire crabs. My question is will vampire crabs get along with green neon tetras, chilli rasbora, scarlet badis, and pygmy gouramis? I dont plan on having all those btw they are just on my maybe list
I am just concerned the crabs will eat these tiny fish. Thoughts?

Thanks and God bless!