I am not shopping at Petco again. I purchased a orchid dottyback from them. Because of my limitations in space, i quarantine the fish with a pyramid butterfly. The pyramid was 5 days into his quarantine process. 2 days after adding the orchid dottyback, the pyramid butterfly had velvet. 3rd day, the pyramid died. I know this, in the petco system, velvet and ich is running rampant. You are sure to get a fish that is sick.
Now if I plan on buying a fish from petco, it will have to go in its own separate quarantine process. Probably a 30day copper at theraputic level with treatments of paprizo for a week. To me, that is not worth it. I would just buy from a reputable store where I know the fish is somewhat disease free.