I don't know much bit I will give you as much help as I can. I don't own frogs yet but this is what I know. I don't think you have what we call American green frogs I think you have white liped tree frogs since they are common in Australia. The temp should be between 70-75 degrees and should drop to 68 at night.

The humidity ahould be at 70 percent.
Feed 3 times a week enough crickets that they can eat in 15 minutes.. feed gut loaded crickets if possible, and calcium dusted crickets once a week.
Lighting they need a uvb light for at least 12 hours a day a night time bulb suitable for reptiles.

Wattage I couldn't tell yell I think it depends on how tall your terrarium is. And if there home is that filthy I would just start over.

I hope this help I don't know everything but this is what I understand and read. And if I'm wrong about what kind of frogs they are the care is still the same..

Good luck jason