New terrarium, and learning

[fish_4_all]

I have been researching, reading, re-reading, studying and trying to figure it all out. I have recently set up a terrarium for tree frogs. Pretty simple, expanded clay bottom of 2-3 inches, layer of fiberglass window screen, 2-3 inch layer of coconut coir. I added 3 small peperomia and added a small amount of worm casting with them.

That is it! I wanted to stay as simple as possible and I think that did it. I know that going so simple could backfire with too little nutrients but easier to amend than tear it apart if I did it wrong to stat with.

I have only recently figured out that a 10 gallon is not big enough for 3 Pacific tree frogs but they are eating, playing and one even started to sing so they are not stressed as of yet. They will be getting a larger tank as soon as I can get one or build one.

My main questions I still can't find answers for:
Will the worm castings be enough fertilizer for the plants along with some compost tea added once a month?
Can I add composting worms to the tank to keep it aerated and cleaned up?
Is it better to use isopods and springtails than it would be to add composting worms?

I know the information is probably on here already but I have not had any luck finding it over the course of a couple days or searching. And google gives me 300 different answers to questions I didn't even want to know answers for.