So I recently added 2 albino bristlenose plecos to my 55 gallon tank. They were around 1-1.5 in long when I got them, and now they are around 1.5-2in long. I have been reading around the boards here, and I am wondering if I may have 2 males on my hands. They both are sprouting little "antenna-like" things on the tops of their heads. Is this the first step in growing whiskers? IF so, do I need to be concerned about having 2 males? I have only noticed 1 occasion where one seemed to chase the other away. Returning/exchanging 1 may not be an option, as they just came from Petsmart and it is past their "return" window.