Good size arboreal tank?

[DanDrobates]

Honestly a 40 isn’t terrible. The additional height would be beneficial but bear in mind they might not make use of it. The majority of WTFs I’ve owned over the past 20 years have preferred to hang out lower than higher and I’ve kept them in both horizontal and high vertical enclosures. If you’re handy or know someone who is you can convert a 40 to a vertical with some modifications. If not the exo terra talls are a great way to go.