Hello David! Need to remove the moss; it's an impaction hazard with a Pacman frog. The substrate should be shredded coco (Plantation Soil or EcoEarth) mixed with dechlorinated tap water until slightly damp and clumps in fist without dripping water out. If you loose humidity after removing moss. can cover part of screen with aluminum foil to help retain it. That will also hold heat in, so might need to adjust that too. More on Pacman care in here: Frog Forum - Pacman and Horned Frogs - Ceratophrys - Care and Breeding .