They will probably not eat during this period. When in the water, they should be able to touch bottom with their feet to support themselves. You then need to begin a vigorous program of artificial rain making. This can be done by spraying the frogs several times a day, or you can rig a misting system with a water pump and an overflow system to the water doesn't become too deep. If you have only one male and want to stimulate his amorous behavior, you can tape record his calls and play them back to him.
Males seem to be encouraged by the calls of other males.
It's useful to float some type of aquatic vegetation in the water to which the eggs can be attached. Following egg laying, the frogs should be removed from the tank. Additional water should then be added, and the eggs should hatch within two to three days. Tadpole management is very time consuming. The tadpoles are total carnivorous, and can be raised on live tubifex worms.