The Black Tetra is a very content, easy to breed fish. Black Tetras are about one and a half inches long and like their water from seventy to seventy-five degrees fahrenheit. This fish lives best in schools five to six with a lot of plants in the tank. Black Tetras are an easy fish to get to have babies and are cheap fish because Black Tetras will eat about any fish food. Black Tetras are content, pleasing hardy, fish that will do well anywhere.