Hey I work at pet store and i find people very stubborn when it comes to advise on animals, particularly fish. I once, even after my recommendations and mh coworkers recommendation , had to sell a man Goldfish, angelfish, Chinese algae eater and other tropical fish. He put them together and came in consistently after that to replace those dead fish. But i cant refuse them the fish that they want. In short. I would help on how to advise them without being rude. Thank you.