Back when I knew nothing about fish I followed the advice of a store employee and ended up with 4 danio's in an unheated, uncycled 2.5 gallon tank (it did have a filter at least). Then a co-worker decided to surprise me with the gift of 2 platies. As you can imagine things quickly went from bad to worse... I literally searched "pet fish help" and guess what came up? I've been here ever since.