My first 18x18x18 planted vivarium

[dmallia]

So 4 weeks ago I started my first planted tank, after a lot of research.

First of all I began by modifying the lid of the exo terra tank. I cut 2 pieces of glass and 1 a little bit shorter so I can have a little bit of ventilation. Than after cleaning the tank, I inserted the zoomed cork background(since it is my first build I wanted to keep it simple) and began by making a layer approx to 2 in. of clay balls, cut and places 2 pieces of weed blocker. Than I mixed the substrate. I mixed 2 parts each of plantation soil, tree fern and orchid bark, and 1 part of long fibre sphagnum moss. The moor wood branch was added and than approximately 2" of substrate was added. The same day I cut some cutting from my fittonia and placed them in a pot in some compost. After a week I removed the fittonia cuttings from the pot, washed them with some hot water to remove all the compost, and placed them in the vivarium. In the first 4 days they seemed not happy since all the leaves where pointing downwards, but now they seem ok. I also mixed 1 of my 5 springtail cultures with the substrate. Yesterday the leaf litter arrived. Now I would like to add another plant or 2 maybe more(a bromeliad for sure to hang on the log). But I don't know what to add. I also would like to have some nice greeny moss. What plants and moss do you suggest? Also I am planning to house my first dart frogs. Would it be good for some species?(still undecided for the species) I'm open to all of your suggestions.