As I walked into my living room (where my aquarium is), I noticed Filbert under his heater, wiggling around. My first thought was "OMG, he's being electrocuted" and I had a slight freak out. Filbert swam over to greet me and seemed fine. I sat down on my couch (which faces the tank) and watched Filbert for a bit longer. He was getting under his heater to use the suction cup bracket to scratch his shell! It appeared that Filbert rather enjoyed it, he kept scratching his itch for about half an hour!
