Well, this is certainly a newb question, but I'm thinking about what to do with a cheap 25G tank (24"Lx12"Dx20"H) I picked up. The brackish fish that I've come across that I'd like to keep are just going to get too big (monos and scats) for something this big. What kindof interesting fish could I stick into such a tank? So far all I've really come across has been a single puffer.