Here is a link to how i kept my WTFs. I lake a larger bromeliad alone with some snake plant. Both plants hold the frogs weigh as the frog gets larger and the Bromeliad holds water and needs not soil to thrive in a tank as ling as its watered and has adequate lighting.
http://www.frogforum.net/vivarium-te...se-bottom.html
If you looking to build a vertical tank, you will need to keep in mind that your WTF will need ventelation so adding in a screen near the top and one down low is needed.

Here is a link to some vertical tanks I did.
http://www.frogforum.net/vivarium-te...d-journal.html


http://www.frogforum.net/vivarium-te...cal-build.html