tangguy, what size tank is the leopard in now? To safely and successfully house two leopards to adultjhood will take a tank atleast in the thousand of gallons or more. There is no way to stunt the shark's growth and it is very inhumane to house one, let alone two, in an undersized tank. I am not trying to come down on you but too many people seem not to want to listen to those of us that have the experience and knowledge. Too many people, far too many, view sharks as a 'disposable' fish, ie once it gets too large they will just give it to a local aquarium. These animals deserve the best care we can give them.