I had 2 clowns when I first started my tank and purchased them as a pair. They were fine got at each other a few times. Then my son dumped all the fish food in the tank and long story short my female passed away. So I went to the lfs
and got an even bigger one considering the one that passed was female it would be easier for the male. They paired up almost instantly and have been even better than the first pair. Imo
the bigger the size difference the better. And they have been hosting my green bubble tip nem ever since. It is definatly a sight to be seen.