Well, I am now completely obsessed with Piranha and they have taken the place at the top of my list. I have a 3" (Serrasalmus Elongatus) Pike Piranha coming tomorrow and have a 40 gal long set up for him and also have a 2" (Serrasalmus rhombeus) -Peru coming with it, and have a seperate tank set up for him as well. I have been doing alot of research on both, but would like to know if anyone has personal experience keeping Serrasalmus Elongatus, I havent found many threads on this species, but have heard that it is more aggressive than the Black P. Thanks.