Oh yeah its for sure are good thing that they do but I assume anyone who gets a fish has done research on it beforehand and knows a bit of something about them and how to keep them well... hell even a quick search on your smartphone in the store helps a lot if something catches your eye and you don't know anything about it.
its quite sad to realize a lot of people go into fish stores, buy anything that catches their eye w/o knowing anything about the fish or if their tank chemistry is correct for them, let alone tank size and diet.. I didn't realize this was such an issue when I made the thread but I've talked to a couple LFS managers that have said people wanted to put pbass in a 20 ga or , more commonly, an Oscar in a small >40 ga tank. By this time anyone who I get fish from locally knows I know what I'm getting and that I can properly care for the fish. Its almost to the point of a joke w/ one of them haha I can usually tell them more about the fish I'm getting then they know themselves
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