The petsmart near me is actually pretty clean, sure the employees dont know anything, but they dont have pacus for sale atleast, and the fish seem decently healthy. I once asked an empoyee if they had any Polypterus sengalus, and got a weird look, then said senegal bichir, and she still just looked at me weird, and then I said, "it's eel like" and she replied "we have a knifefish, those are pretty much eels" I looked in a tank and actually found a few senegals, and I showed her and she goes "Oh! I call those dinosaurs"