... BOTH parties need to take responsibility...
Excellent post. And as to the following post stating that it's nonsense, I say shenanigans.
Every shopkeeper has the responsibility to know and understand their product so that he/she may provide the customer with sound advice that benefits the shopper and the well-being of the fish. That is called ethics.
The average beginner does not understand the intricacies of fish biology and aquarium keeping. Not that it's rocket science to keep a healthy community tank with hardy species, but most beginners are basing what they know about keeping aquariums from the perpetuated myths of the hobby, information they received from Joe Blow the Neighbor who just bought a tank, and the misperception that the only requirements are filling a tank full of water, adding fish and feeding them. People don't even realize there is volume upon volume of literature out there. They've never heard of the nitrogen cycle. They know low pH is acidic and high pH is basic and that neutral is 7. Water is soft or hard. They know fish have fins and gills and live in water. IME most people do want to be responsible for the needs of their pets, but just don't know how. When the first contact with the hobby a new fishkeeper has is most likely with the person selling him or her the tank, it IS the responsibility of the fish store employees to set him or her on the right path.
Once started down that path, every fishkeeper has the responsibilty to research the needs of the fish he or she wishes to keep and the responsibilty to provide for that fish (or invert) appropriately.
Responsibilty is a two way street.
WYite