Introducing piranha to an established school

[Charlesshales]

Have three two inch piranha And I just got a 125g tank and I think three would be quite slim for that large of a tank. I know they are schooling fish but would simulating a rainy season make introducing new fish of the same size easier?

 

[Joe5688]

I don't really know what u mean by simulating raining season but you shouldn't have a problem adding more in the future. I used to have five and they all got along. your lfs will sell a yellow bottle of stuff that turns your water into a brownish color. piranhas prefer it.

iirc they would be kept in odd numbers.