My BGK seems to be somewhat timid with my 10" Tiger Oscar. But I have yet to see the Tiger Oscar go after him, even when the BGK wags his tail in front of the Tiger Oscar, and sometimes poking him in the mouth with it.
I was hoping to get something that would be strong enough to withstand the aggression my Tiger Oscar shows towards other fish. He has killed an Albino Tiger Oscar, and a Jack Dempsey. I've heard a Jag is known for bullying Oscars, so it should be strong enough to withstand my Tiger Oscar, and give it back to him. My tiger Oscar even likes to ferociously attack my hand and the gravel vacuum when I am cleaning the tank. He's abnormally aggressive to me during cleaning, and with other fish. At feeding time he acts like a puppy dog and wags his tail fin and with happily eat out of my hand very gently.
Maybe he wont have a problem with bottom fish, since he seems to completely tolerate the BGK. What would you say about adding 2 or 3 Clown Loaches?