Anyone Know Whats The Minimum Tank Size To Put 4 Cm Piranha In?

[alanox205]

Hi I'm thinking to buy a small piranha, but I don't know if my tank is big enough.

 

[jwalser18]

50 gallons for the first piranha, 10 gallons more each piranha 

 

[fluttermoth]

The most important thing to remember with 'small' fish is that, very often, they're only small because they're babies!
 
You should always base your tank size on the eventual, adult size of the fish.