ORIGINAL: TREEDOG
Sorry to hear you lost an oscar. I hear they can live 10-15 years. Whats the expantency on your pirahana? Is there anything suitable for a tank mate other than other pirahanas?
With this one nothing is a suitable tank mate. Not even other Piranhas. I dont know exactly how long it will live for but they have been known to live for 20+ years in a tank. They grow to about 6" in the first year and then about 1/2" a year after that. So when mine hits 18" it will be about 25 years old.