i bought 4 goldfish today and put them in the tank with my piranhas, i thought they would be friends!!!!!1 i guess one of the goldfish said something to the biggest piranha and he didnt like it so the big guy got a little mad and ATE HIM! and the other gorldfish musta got mad and said stuff to the piranhas the piranhas didnt like be in less than 20 seconds they piranhas had aten all the goldfish! oh no! what a waste of $1.21 at walmart, oh well... im gonna try it again on monday