With a lone one you want see it's best colouration or the great social characteristics that the species shows. I have 5 (6 until very recently) in my 300L and they are constantly flaring and chasing each other, but with no ill effects (it's all show).
My tank is 180 litres. I have a male betta, neon tetras, harliquin rasboras, platys, a molly, a clown plec, corys and the ram. Do you think I could add some more rams?
Ok guys, thanks! I'll look for a couple of females and see how it goes. I hope I sex them right. I think he's full-grown so I'll get some mature ladies.