I like them. I plan on setting up a tank for Serrasalmus geryi (violet-line piranha) later on down the road. Although they're not "true" piranhas they're probably my favorites.
love them. started with pygos but had more interest in solitary serra species. here is my pride and joy 7" diamond high back rhom. a lot of piranha behavior is overrated but this guy will chase me when i walk beside his tank and bites the magnetic algae scraper just like a central american cichlid.