I know a couple of people that used to work / work at Petco, they all say "get the merchandise before it hits our tanks, meaning be there for the delivery and grab them straight from the vendor tank. Never had an issue with fish I got that way, the one that were bought after sitting in their system are a totally different story, ...
Most of the vendors / importers quarantine and treat, part of the import requirements from what I've been told, so chances of getting bad stuff from them are not that large, once the livestock gets into a system where the retailer puts the "returned" stuff all bets are off.
Most of the vendors / importers quarantine and treat, part of the import requirements from what I've been told, so chances of getting bad stuff from them are not that large, once the livestock gets into a system where the retailer puts the "returned" stuff all bets are off.