Dendrobates tinctorius group composition

I have several terraria (50cmx50cm×60cm) and would like some dendrobates tinctorius to inhabit them. I know that it's the females who establish territories and show behaviors of dominance with this species, but what about the males? Would it be possible to keep 3 Frogs in one of these enclosures? I was thinking about 2.1 (two males one female). If provided with enough structure would they do fine in one tank? Are there differences in sociability between morphs? Many thanks in advance!