Not much hope for them unless you separate them. You'd need to read up (pretty sure a Google search will get you a load of decent info - breeding clowns is quite common), set up a special tank with filters they won't get sucked into, various grades of food sizes as they grow, etc. A lot of faff, but very rewarding I'd bet.
Bear in mind that Maroons are not the most sought after though, as they're normally pretty aggressive.