So, about a month ago I started a new job at a small local pet store and even though reptiles are my specialty, I really enjoy working with the fish and helping people with them. I've had my own fish tank for about a year but the fish I've had is very limited. So my question to you is, name a few of the top things that you with pet store employees knew and would tell people. I know some of the basics, like don't mix gold fish and tropicals, S. American and African chiclids, oscars and plcos will out grow your 10gl tank and they don't call them angle fish because if their personality.