Tank, sphagnum, light, and sturdy plants provide an easily built and maintained amphibian terrarium.
All that is needed to make a very pretty terrarium for horned and other bulky frogs with limited leaping ability is the tank (ours is a 40 gallon), a complete cover (with horned frogs a cover may not be needed) but if arboreal species are housed within not only is a cover needed but a suitable perch should also be provided, a suitable light, enough good quality unmilled sphagnum moss to provide a 3” deep bottom cover, a few hardy plants (I prefer philodendrons, “pothos” or similar nearly indestructible species, and, of course, the frog inhabitant. Since the sphagnum will be kept damp and clean, unless you are intending to breed the species a water container is optional. If a water container is provided be sure the water is kept clean. Ditto with the sphagnum bottom cover. To prevent the sphagnum from being ingested by a hungry frog, food items may be proffered on forceps or from the fingers (the latter sometimes and with some species not being an especially good idea!). With an escape proof top this setup also works well for salamanders.

From this point on pictures will probably be the most descriptive. I hope you enjoy your frogs as much as I do mine.