I just setup a newly purchased 12x12x18 Zoo Med terrarium for $30 on craigslist. This setup is only temporary and I want to attempt to use live plants in the finished tank (All I have is pothos). It is currently holding my two crested geckos, but they will graduate to a larger tank by next week.

So my question is would my current setup be appropriate for 2 Grey Tree Frogs or Barking Tree Frogs?

I've read the care sheet on the grey tree frog and noted that it said 2 pairs of frogs could fit in a similar sized tank, I just want to confirm before I move forward. I would appreciate any info or incite on the matter