The pair gets along great. As a matter of fact, I thought about taking the female out since they spawn every month and a half or so. The one time I pulled her out, he swam around pouting and seemed to be all sad. I couldn't help it but to put her back in and they've been together since. The two go back and forth with their agression, but it never gets any worst than a few cracked/split fins. She does seem to get into a PMS mode every now and then and smacks him. LOL