Keeping it simple with a terrium/vivarium is the way to go. At least starting out. Frogs are extremely simple especially compared to a sw tank.

My bug cultures are getting ridiculous though. Especially fruit flies and springtails. They're starting to be more work than the frogs.

Advice: The search function is your best friend. 9 times out of 10 a bunch of people have asked the same question you have.

 

I would stick with a terrarium. Being new to the hobby, I can tell you there are a myriad of little issues that all require addressing in order to provide a healthy habitat for both the plants and the frogs. There's much more to learn here than what's initially apparent. Do a search on water features in dart frog vivariums- you'll find plenty of discouraging info, and I have to say I'm glad I was talked out of it.

Secondly, dart frogs aren't swimmers. They don't even have webbed toes. So if you do decide on a paludarium, that's the first thing to address in your design- an easy out for any who fall in- usually involving a sloped "beach" of sorts, and this brings in a whole other issue about preventing your substrate from wicking water from the pond and remaining soggy.

I don't want to discourage anybody from building a paludarium, mind you. They can be a superb piece that trumps both aquariums and terrariums when done well. If you get your heart set on a paludarium, I wouldn't recommend dart frogs- at least not to someone who has never built a paludarium nor kept dart frogs before. There are more suitable inhabitants that would make a successful paludarium easier to achieve.

 

Thank you both. I'm keener to keep the frogs than the fish so will go with a terrarium approach. I've read conflicting views on water and darts but to start with I think it best to keep it simple and avoid the risk of drowning. Its also been suggested to me that fish/water might be a vector for amphibian diseases.

I've been looking at a Biopod Aqua which I think can be used without the deeper water element but will now also look at the Terra (or I will when they are available in the UK!)