It would need to be set up and cycled like any other species only tank. I believe the fry are hard to feed though. You would need to consider multiple species only tanks and specialised feeding for each of the fry stages. Lots of energy and time. Is this for a business idea? Or for fun? Unless its designer clowns I can't see a profit in breeding regular clowns when they are quite cheap to buy, all that time and effort raising frys...