Say my common pleco grows to be a size of....oh, let's see, 15 inches. What would the MINIMUM tank size be for him? I've grown very attached to the little guy and I'm going to (try to) convince my mom to get a larger tank. I just hope when I ask her she doesn't bring up the time I got attached to our old washer and dryer...ANYWHOO, what's the minimum tank size for him?