One technique I read about for pairing maroons was to either make a divider for the tank or use something like a hang on breeder to put the new clown in so the established one can see it, but they can't physically interract. After a couple days, introduce the new, smaller clown. If they fight excessively, separate them again and try the next day. If this doesn't work after three days, it's probably not going to work. I found out too late exactly how difficult maroons can be to breed, but I really like mine, so once she grows up a bit more (about 2" now), I'll probably try to find her a mate, so I'm doing as much research as I can now. Let us know how it goes if you give it a try.