[Socratic Monologue]

So the simple answer is "As much space as you can give them".

Sure. 🤷‍♂️

I can't think of any dart species whose optimal viv size would be smaller than the largest available off the shelf Exo (36 x 18 x 36). Possibly I don't understand the question, though.

 

[Socratic Monologue]

I'm not going to delete a thread that violates no formal or informal rules here.

You posed a question, and repliers are giving their input. Pointing out that this information already exists here in some format or other is not an uncommon response to many questions here. One might reply that there's value in having that information listed is a sort of a chart. Then someone else (like me, for instance) might reply to that by pointing out that this might risk more first time keepers referring to such formalized recommendations (akin to 'frogs per gallon') and dissuading them from actually understanding why certain vivs are appropriate for certain frogs. And then someone else would counter that with something we hadn't mentioned yet. That's how discussion goes; the forum isn't, for better or worse, a vending machine where one pushes a button and that exact thing falls out.

This is all typed in a very friendly tone, since I don't think this is anything to get upset about.