BN Pleco strange behavior
So I've had my BN Pleco for about 4 months now. He was just moved into his new 25g with some guppies yesterday. Tonight is the first time I've seen him exploring his new home. I have a car bubbler (the hood goes up and down to release bubbles) and he keeps sticking his whole head inside the hood/on top of the air hose. At first I thought he was curious, but he's done it 4 times now in an hour. Should I be concerned or is this just part of his personality?