I know you cant keep two silvers together, but can you keep a silver and black together? theyll be in a 100g tank for around a year until i upgrade to a 6'-30"-31" tank. ill get them both at 4inches.
bad idea. One of them got picked on. When I came home one day I thoght one of them jumped out of the tank. I searched for him, and found him hiding under a piece of driftwood.