Currently I main large tank is a 50gallon and contains 4 red bellied piranhas and 4 crayfish. The tank has been set and running for more than a month now. Was housing 2 red bellied pacu but lost them to some bad sickness. As stated that is my current oppupants. My question for you all is, is my tank too crowded. I have added several pieces of drift wood and several plants to give it a more natural feel. I want these fish to be as successful as possible. Here's a picture of my setup. Tell me your opinions.
