I'm sorry you lost Mr Hooper.
If he had lived, you would have gotten quite a bargain - that was definitely not a common BN plec.
Lots of times, the plecs in the lfs
arrive underfed. They like an established tank with lots of algae, algae wafers, and fresh veggies. They're rather shy, so they sometimes don't get enough to eat if they are displayed in large numbers, or with lots of aggressive eaters.
I hope you have better luck with your new BN. They're great algae eaters and fun to watch while they're sucking on an algea wafer (that is, if you can find them - they have excellent cammo).