royal grmmas like a lot of rockwork to hide in to feel comfortable. they are not open water swimmers. the more rockwork the more comfortable thus more time they spend out. it is just looking for a place to hide. try putting in a piece of pvc tube or long dryed out rock (so nothing bad to beat the pont of wat ur doing). if you go the rock rout put it in a corner with a little room behind it for it to hide. if you try pvs tube 1" by 6" or so would work just try to place it so the end of the tube isnt facing towards a lot of movement in the room.