I keep a pair in a 39 gallon lizard lounge with live plants, two water dishes, various hides and some sand blasted grapevine for preches. Make sure if getting live plants that they are non-toxic. Plastic plants are another option. Humidity is around 60-70%. Temperature are in the low 80's durring the day with a decent gradient, and nighttime temps can get as low as 65-70. These frogs may look "cute" when obese but it's not healthy for them, just like us.
Watch their weight. I do feed both ONE pinkie once every couple of months, depending on weight. Just don't over do it with any of their food. I've posted this before but take a look at this article on water. The type of water you give them is very important, they're amphibians!
http://www.livingunderworld.org/amph...rticle0006.htm
Good luck and i hope at least one of them is a male. Their calls are deep and stunning.