Sorry to hear that, I think Hao would have a better chance. He has 4 arowanas in that tankwillarow;4249680; said:best luck, i try to put my lei and jar in the same tank but it didn't work...first few days was fine, like yours swim next to each other and no fight...but as time goes on, my lei is slowly getting beatup and i have to move the jar to different tank before it's too late...swim next to each other is not a good sign, i think this is the way for the arows to size each other