I am fully prepared to make the move with these guys if their aggression levels increase as they age. The male and female flowerhorns fight a little here and there but nothing major. Even just now as I checked them out, its dark and (nightime). All four are in the same corner together taking a nap, both oscars and FH's. I have been trying to feed these guys pellets but they don't seem to go for it, blood worms and silver sides, they wipe those out,,,fast! So far so good though...I also have a blue maroon, and tiger lobster in the tank. But since the creation of their habitat, all were very very small and are basically "growing up" together. If I pull this off, I will be happy, I will post some new pics soon, we are also getting ready to put a larger tank together...one that will hopefully cover the entire dining room wall. I hope!