Does anyone have experience with these species together in a tank? I am special ordering 11-13 P. gertrudae for my tank. A LFS has two lonely female P.furcatus. I was thinking of rescuing them, but only if they might happily shoal with the P.gertrudae. They look similar, so I thought it might be a possibilty. I don't plan to build a separate group of P.furcatus, I just feel badly for the two "left behind" fish. Would rescuing them be in their best interest?