Black Piranha

Question
Can you tell me what is the average tank size to keep one Black Piranha from young to adult?

Also tank size for 6 red bellied piranha is the rule of thumb for this species 30 gallons for each piranha?

Also can I feed them stuff like this?

http://www.sfbb.com/product_popup.asp?category=frozen-shrimp&prod=Sand Eels&id=11



http://www.sfbb.com/product_popup.asp?category=frozen-shrimp&prod=Silversides&id...



http://www.sfbb.com/product_popup.asp?category=frozen-shrimp&prod=Squid&id=6




Thank you for your time.

Answer
Hi,
Thanks for asking me a question about big fish, it rarely happen and I enjoy answering them.

Black piranha can get a solid 20". I'll list the size of the tanks that you would need for the black piranhas.

Black piranha like to school and produce lots of waste.

three 2"-8" black piranha= 75-100 gallon tank.
three 8"-16" black piranha= 100- 180 gallon tank.
three >16" black piranha= 180- 260 Gallon tank.

The stronger filter the better.
Hope that helps.