Well, I am getting a 194 gallon tank (60" long by 30" wide by 25" tall). It is the perfect tank. I wanted a tank that gave my fish more room to turn around. I dont know if I'm gonna put piranhas in it. I like them, but thats all you can put in a tank. I like variety. I think I'm going to put a sailfin marble cat, a silver arowana, and maybe a peacock bass. I am so excited! Do you think that is too much? Yayyyyy!!!!