You lost me here... Have you ever actually been in a Petco? From the several stores I've stopped in, they're little more than a disgrace to the marine aquarium industry... Sorry, but little chance DFS is getting my money ever again due to this association.
Ike, I think it depends on the individual store. Here in Tacoma, Wa, they have a store on 6th street that has their guy who takes care of aquatics and he has two tanks at home and is quite knowledgeable. The tanks are all kept clean and well stocked and I have bought several fish from here and they are healthy and happy.