I must have a weird pleco then. Mine swims around a lot during the day. Back and forth across the tank. Up and down. Sometimes he'll just swim to the top real fast and hit the surface, then gracefully swim away. He actively eats when the lights are on. Goes right to the center of the tank and battles for the pellets I put in for all the other fish. Heck, he's probably more active than my Jack Dempsey!