It is possible to breed them in captivity. But if you want to breed them at home, you'll have to be really open to the idea of what counts as a 'home tank'. I can only think of a handful who have room for an adult pacu. And once you have that covered, you'll need a group of adults.
I was more asking the question cuz i dont want them to breed. I have two now and I want to put them in the same tank but I dont know how i would handle even a dozen 3 ft monsters cuz two is already pushing it.
if they do by chance happen to breed just siphon the eggs up. I can imagine it would be horrible trying to get rid of all those monsters. you would need a huge tank for them to breed and still it probably would be tricky.
if u do breed them in the hme aquarium you would join a very elite group i would imagine. The person i know was only the second in the us o breed them and he uses a HUUUUGEEEE man made lake style pond for them to breed in.