one shop i talked to won't take returns but will sometimes take fry, dependingon the fish. the other will take fish back or will take in unwanted fish, they give you half the selling price of the fish in store credit, then they put the fish into species or community specific tanks and sell them for less without a health guarantee (if they are cichlids or more expensive fish, they quarantine them and then sell them, if theres a disease outbreak in the tank from a return, they label the tank as not for sale). they tell peopel buying from the cheaper mixed tanks that these fish do not come with a health guarantee like hte other fish. both shops are privately owned stores. the chain stores do not take fish here. i'm fine with the practive (they ahve a whole tank full of large plecs and various cats and pikes and oscars and such that people returned when got too big, which is a great way to prove to consumers the future size of their fish. they do warn people about the source of the fish so its becomes a case of buyer-beware, which is as it should be in my opinion.