Hey there. I have a maroon in my tank, and I've tried pairing. I introduced a much larger maroon into the tank, and believe it or not the smaller one that was already in the tank practially ripped her to shreds.
I then did more research, which I perhaps should have done in the first place, but there ahve been a few succeses stories in this thread about pairing maroons. The best method went something like this:
Start with a resident maroon in your tank, in other words have a clown already living in the tank on it's own. Then introduce a much smaller clown. How small is up to you, but it's suggested to get almost the smallest you can within reason. One thread in here had good success pairng a big maroon with a male about a quarter of it's size, like 1 and 4 inches let's say.
Anyways, you don't want to just accilimate the new fish and throw him in there with the bigger female. It's best to seperate them for a while. You can sometimes gauge they're reaction to eachother by floating the bag in the tank short term, but the best way is to find some kind of plastic container to put it in, with plenty of holes to allow flow, food, etc. A friend of mine had success with a see-through tupperware container with dozens of slits sawed all around it. Make sure you don't have really jagged edges though.
Anyways, you can then watch how they react to eachother, it could get pretty vicious. When it looks like they are calm around eachother, or even start showing weird behaviour like shaking around or nudging eachother, try lifting the container.
They will most likely fight for some time as the female tries to establish dominance and such, but don't let it get to far. If they start ripping eachothers fins up badly get the guy back under the container, wait for them to stop the aggression and try again. IT could take days, and oyu don't want to rush it. If they are getting hurt or you don't have any success after a few times you may need to try another fish, you don't want to keep a clown trapped in a small plastic container, of course.
Try turning the lights off when you introduce the new guy too, it might help to clam them.
Hope that helps, you may be able to find a few threads about it around here, my info is mostly secondhand
