On an odd note, my red banded has mated up with some of the oddest company I've ever heard of. My Midas Blenny was first, then when I added the Purple Firefish, the Blenny moved up to a hole in the rock and the Firefish became his new buddy.
Now it seems the Coal Beauty has taken a love of the hole too and the firefish and the beauty take turns covering the cave. Yeah, who'd a thunk it. A coral beauty and a red banded paired up. And I mean SERIOUSLY paired up, as in the beauty brings over bottom dropper pellets to him. There's a 6 hour split, the firefish has the AM shift, then the beauty takes nights.
Don't assume because something doesn't "normaly" that it won't. Remember, this isn't the ocean. Darwin's at work in the aquarim. Make due with what you have. If you're best friends not here, make a new friend.
Tim