I have already had a succesfull community tank for several years, and i would like to expand my hobby. Im very interested in piranahs, and already know most of the facts about them. But what i am unaware of is their behavior, i would like to know more about their diet, their compatability with other fish (if any), and what their home should be decorated with. I am serious about getting a piranah tank, and understand the time and money i may need to spend. Please tell me anything useful that u know about them. Thank you.