[Myka]

I would suggest you get a juvenile, not a bigger special order one. You don't know the history of a bigger one. It could certainly have already paired with an even smaller one, and could certainly already be female. Buying a juvenile guarantees it is not female, and juveniles are more submissive which makes pairing easier. If you want to risk it with the bigger one, go ahead, but do realize that it may not work, and you might have to find a new home for the new fish.