When I consolidated my 3 fish tanks into one new 156, I thought that since every one has a new much bigger home, they would get along. My Maroon clown disagreed. It was in a 50G and my black and white Ocellaris, of the similar size, was in a 40G. The Maroon did not give the Ocellaris any chance from day one, The Ocellaris ended up hiding at the top corner of the tank. The final straw was when the Ocellaris ended up in the overflow. We had to put him in another that where he now lives with another b/w. They lay eggs at least once a month but the babies never make it even though those 2 clowns are the only fishes in the tank.
Oh, that consolidation idea.. I now have 4 tanks and am thinking of adding a frag tank. So if you are looking for an excuse to possible start another tank and your finance is not too keen on another tank .......