I asked a friend and he said having the control over temp. was the the biggest plus for him, making sure it didn't fluctuate too much. Also 'nuking' leaf litter for substrate makes them a bit more active and secure.
From the net:
Animal Description:
The Leaf Horned Frog is an example of an animal that is very well adapted to its environment. These unusual looking frogs are difficult to view in the wild due to their incredibly good camouflage.
Leaf Horned Frogs tend to be rather inactive, both in captivity and in the wild. In their natural habitat, the Leaf Horned Frog usually sits absolutely motionless on the forest floor, relying on its camouflage to hide in the leaf litter. When a suitable prey item passes, the Leaf Horned Frog will spring into action, gulping down the insect, frog, small lizard, or small mammal. Usually, scorpions and small crabs are the main food source, however. The calls of Leaf Horned Frogs are best described as soft metallic "ching" noises, but these frogs will not make noises if they are disturbed. In the wild, Leaf Horned Frogs are most often found on the floors of mountain rain forests. They tend to spend roughly equal amounts of time in water and on land.
Most male Leaf Horned Frogs attain lengths between 3 and 4 inches (7.6 and 10.2 centimeters). Females average 5 inches (12.7 centimeters). Their skins are smooth, and usually the dorsal coloration is a combination of shades. These are often russet, tan, gray, or brown colors. The heads of Leaf Horned Frogs are very large, and big triangular projectile horns are in evidence above each eyelid. There is also a projection from the snout. Skin folds fall from the tympanum down to the shoulders. Leaf Horned Frogs do have webbed feet, but the feet are only webbed at the bases of the toes.
The Leaf Horned Frog is native to the humid forests of Indonesia, Malaysia, Borneo, and the outlying islands. Although their behavior is very similar to that of South American horned frogs, they are not closely related to that New World family.
Specific Care Information: Relative Care Ease: Relatively Difficult
A large terrarium with both land and water areas is ideal for housing a Leaf Horned Frog. These frogs should be allowed plenty of hiding places. It is often nice to have a looser substrate that these frogs could bury themselves in, but the possibility of digestive impactions is high due to the way these amphibians lunge at prey. The substrate should aid in maintaining humidity levels also, as Leaf Horned Frogs need cool, damp environments. Temperatures should remain between 72 and 75 degrees Fahrenheit (22 and 24 degrees Celsius). Leaf Horned Frogs can be fed insects and often prefer arachnids. Adult animals can also be fed pinkie mice or pinkie rats. Crab meat may also be offered.
Breeding and Propagation: Relative Breeding Ease: Average
Leaf Horned Frogs are often bred in captivity. They are oviparous and usually deposit their eggs on the undersides of partially submerged rocks or logs. If eggs are not fully submerged, they will slide down into the water on a jellylike thread when they are ready to hatch. Leaf Horned Frogs lay relatively large, though few, eggs. The long tadpoles have funnel shaped mouths. They feed on microorganisms on the surface of the water and usually dangle their bodies below their gaping mouths, positioned at the water's surface.
