In my 2ft tank, I have a 4.5 inch maroon. In my 3ft tank, I have a 1 inch maroon... Right now, they seem to tolerate each other unless they bump into each other and a round of chasing begins...
Funny thing though, I thoght you said your ocellaris was chased around by your maroon...In my tank, just now, when they bumped into each other, your ocellaris chased your maroon... I guess this is karma...