In doing some more research on the Pacu, it seems that the biggest complaint from aquarium owners is that the Pacu quickly outgrows their tank and the owner doesn't then know what to do with the Pacu...hmmm, a pond with LMB/HSB would need relatively large Pacu to escape predation...maybe that would solve both problems at once...aquarium owners take their large Pacus back to the fish store where a pond owner could pick them up for stocking. I wonder...and the way they are purported to eat plant matter...hmmm, kind of intriguing. Thinking out of the box.