It seems like people dont even want to know sometimes. If you've ever worked at a pet store you know this more than anyone. People buy animals without knowing anything about them this is how fish get abused. Currently there is a oscar where i work that is about 10" and was donated but they kept him in a 15 gallon tank. Hes just depressing, hes perfectly happy but he just looks horrible. Why do you think people buy fish without knowing they can safely home them? I believe they underestimate the growth rate of fish.