At some point in the future, I wanted to get two American Green Tree Frogs, and I saw that one person in this video had this type of tank, a Mini Tall Exo Terra Allglass Terrarium which is 12”x 12”x 18”. I just want to check if that would be suitable for the frogs? It doesn't say how many gallons it is, and I have no experience with owning frogs, so I'm quite unsure.