Plecos need a bit of a varied diet. Ours at the store love a bit of zucchini rubber-banded to a rock to make it sink. We do that about once a week. They also munch on any wood that's in our aquariums. I don't know if he'd eat fish food or not....I'll ask at work.

They live a long long time, so you may have him for awhile yet. I'd name him Oswald.