I used that rock lair in my tank on the "hot side" and my bp seemed to like it. Internal temps were 85-90. I switched to basic black plastic now that I'm in Animal Plastics enclosures and that seems to be working fine. Now I'm stuck with a rock lair I'm not going to use LOL
Well now you need another noodle to fill it!
I actually saw your thread, and that you mentioned it. About big was your ball when it was using it?