Humidity-wise it's important to know the species. The requirements for Phyllomedusa hypochondrialis differ from those of Phyllomedusa tomopterna.

Just reading back, you do understand that they are strictly nocturnal? There will be no movement at all during the day as they will be asleep, most active time is shortly after lights out (often with a visit to the water bowl initially) and they remain active (hunting) throughout the night until going back to sleep before sunrise.