Clowns

Yeah, generally speaking that works fine. You must understand that clowns are all born male and the largest most dominant clown will become a female. This is a terminal change (they do not revert). Two females (matriarchs) may be prone to fighting, a group of 4 will usually work pretty well, and even if two eventually develop into females they usually are well dispositioned toward one another and will continue to get along long term. If they're already well established pairs, with that amount of space they should be able to work it out and prove compatible within the same tank, but they will require some close monitoring for a good month before you can really dicern what their orientation is toward one another.

 

If they are paired up, I doubt it. It never worked for me. They always fought and one pair had to be moved.