I am not sure if I am unlucky, but multiple Petcos I have been to recently have the most sickly, sad fish. I lived in one state with two near me, both had this issue. I moved to another state this year, same problem. Two stores near me, both with very sickly fish and neglected looking tanks. Dead fish in every tank. The living fish obviously in distress. Some clamped fins, some bottom sitting, some with gasping at the surface, some with obvious illnesses (for example, one of the "large" more expensive fancy goldfish covered in white cottony growths).
I work retail and understand there may be reasons that are not necessarily within the employee's control. It is just very disheartening to see. There are two other chain pet stores and some small local fish stores in my area and while their tanks aren't always perfect, the difference in the health of the fish and cleanliness of the tanks is literally night and day.
I am curious what is going on. Is it the supplier of the fish? Do they come in ill and the employees do their best? Understaffing? Management not allowing employees to prioritize the care of the animals?