hey all! I have a guestion for my grandma. At Christmas time I got my grandma a 1 gallon or 1.5 gallon(not sure) tank to put a betta in. Well, a few months later the betta died. So now she doesn't want a betta or a goldfish. Her tank has a bubble tube in it. No heater or filter. She wants to know if there is any other fish that would be able to go in her tank. Thanks!