Now I'll be honest, when I first got the idea to set up an aquarium it was more of a " I've always wanted an aquarium" kind of a thing and unfortunately the biggest mistake that I made was not getting properly informed and thinking the classic - " How hard can it be ".Well its more complicated than it looks and there if one piece of strong advice that I can give it's this: GET INFORMED! Not like a quick google search here and there. Really take the time and understand the basics of fish keeping. It will save you a lot of stress, money and fish lives.