Yellow belly piranha

[Kieran]

I have a yellow belly piranha, had him for about a year and a bit, he's in a perfect setup, has pleco in there and a few neon tetra doesn't bother him! Just wondering if I could put another yellow belly in with him, I know it's frowned upon but I've seen photos/videos of them together, just looking for a bit of advice!

Thank you

 

[CAPSLOCK]

With no experience with pirhana, if you are saying you know it is frowned on and your guy is doing well in a good setup, why add another?

FYI you see all sorts of things online where someone either throws fish together just for a video, or gets lucky and uses one success as gospel, or crams a tank crazy full of fish and just keeps replacing them from inevitable deaths.