Hello, I've got an African Goliath Tigerfish about 4.5 inches long at the moment, and the little bugger is incredibly skittish. Any movement he detects in the room, he's sprinting up and down the glass on the side of his tank. He isn't trying to jump out quite yet. It has gotten to the point that his nose is wearing down and he has apparently lost some of his front teeth. My first guess would be cover most of the tank with a sheet to keep him from getting excited, but where the hell do I go from there? Any suggestions/opinions would be much appreciated!