Is this appropriate for a bioactive terrarium?

So, I put boiled pebbles, and hydroballs on the bottom along with an unfinished drainage system. I have added the mesh layer and have added some organic soil and plantation soil from exo terra along with a little exo terra bark. I can add more soils if necessary... I have planted a hibiscus, an umbrella tree, and one other that I forget what it is called, but I know it's one of the best for chams. Anyhow, is there any way I can improve? I have not ordered any isopods or springtails as of yet. Do they have to be a special species for each bug? Do they have to be tropical? Also, how will I know if the ventilation is okay or not? Thanks for your input. Much appreciated....
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