Is something wrong with my Pleco? I just got him a week ago from the pet store, and he spends his entire time in the corner of the tank hiding behind a plant (live). Sometimes he chills on a leaf where I get to actually see him. Sometime he'll come to the front for a few minutes before darting back to his corner. He seems either really shy or really scared. I've never had a pleco before so I don't know if this is normal. My dad had a huge one in is 300 gallon tank and that guy would be so active and would always be out in the open. (Sorta what I was expecting, they look awesome)