I have 4 year old pacu, and I have just moved him to a 90 gallon tank. He's all by himself, and not liking it. His girlfriend died durring apower outage earlier this year and I am contemplating getting him a buddy, maybe an oscar. I've had no success with putting any small fish in the tank with him, he just eats them. I'd love your thougths and suggestions on getting him a buddy. He's a little bigger than 1 foot long.