what do i need?

Question
i dont know what size tank to get for the two 1in. red belly pirahnas that im getting soon?

Answer
Hi Caleb
Red belly piranhas will grow to about 12 inches.  I would recommend for 2 nothing less then a 75 gallon tank.  Of course you could start out a bit smaller, and then just keep upgrading the tank as they grow, but I believe you're better off starting out with the proper tank size so they can grow appropriately, not to mention that's probably a lot cheaper and less of a hassle in the long run.  Did a quick search on them, and most sites are recommending nothing less then 100 gallons for them.  Also, I'm not seeing it anywhere, but I do believe they are a schooling fish, so it might be best to up the amount from 2 to at least 3-5 of them.  Here's some links to read over:

http://badmanstropicalfish.com/profiles/profile7.html

http://www.timstropicals.com/FreshwaterFish/Piranha/RedBellyPiranha.asp

This site/forum is probably going to be your best bet for info on them:

http://www.piranha-fury.com/information/profile.php?cat=p&id=2

Good luck!

Christy