Ultimately it depends on the size of the froglets and how many. You need to have enough room for them to find the spots they like but not too much as they’ll have problems finding food. A vertical 5 or 10 gallon could house a few of the first three species. Add some moist paper towel and a little spagnum moss in the corners. Provide a wide shallow dish to soak in and provide some cork tubes for hiding.this setup should suffice. Remeber these are small even as adults so if they’re significantly small try a vertical 2 gallon.