I trained my oscar with this method. He would cram every bit of food at feeding time into his mouth and sit there gasping while fish picked off the food that floated out of his mouth. After a while he became very tame and only picked off food he was going to eat.
I know it sounds crazy but I've seen that behavior change with my own eyes.
Im gonna have to try this with my 5 inch flowerhorn. Tonight im going to pick up an arowana and dont want him top give him a hard time.
I dont understand this guy when i put him in the tank he went straight to a 13 inch bowfin and started picking on it. But then at night he cozys up next to him. He also chases my 2 pacus (4 inch). But wont mess with my 10 inch RTC. HAHAHAHA Hes the true boss of the tank. Doesnt mess with anyone and NO ONE bothers him
This strategy sometimes works, but the only way to really let the fish get used to each other is for them to share the same space; with no dividers. Still, I've known people who have had luck using this tip with small species.
I tried this a few times with a community tank. Sometimes it worked, but other times the bully ended up in the turtle tank >