So my 16" rtc is in my 125 gallon tank, he is the only fish in there besides a Pleco. Lately he has been thrashing around the tank, moving rocks from one side of the tank to the other, and I mean huge rocks, there are no plastic plants, he knocked the heater off the tank and melted the clip, did not eat the suction cups (THANK GOD) he has been just thrashing around and destroying the tank. What is going on? He has light for 8-10 hours a day then it's off. He gets fed all sorts of things, he had 3 large comet goldfish7 days ago and that is the first time in probably 8 months that he has had a live fish. He just ate 3 chicken livers 2 days ago, tank is on 82-84, water is CRYSTAL CLEAR looks like the tank is empty it's so clear. Why does he keep doing this? My heater cord is also melted he tangled it all up do bad. I have it out of the tank and will not be putting it back in. Is he lonely? What is the deal? I love him too much to get rid of him...