Was he pissed when you let him out, ha ha. Like letting a bull out the penI had a big Midas that would punk my other fish. A few times I caged him in some big heavy driftwood so he couldn't get out. He would still try to taunt the other fish though he was trapped in his own driftwood cave.
Once he figured out he was trapped he would try to push the wood. But I piled the wood up so he couldn't escape. I'd keep him in there for most of the day. I would let him out never gone overnite with him trapped. It didn't stop him from being mean. But it did give my other fish a break from his terrorizing themWas he pissed when you let him out, ha ha. Like letting a bull out the pen