I havent done it yet but I have read about how to do it. You will need to culture phytoplankton and you will end up feeding them to rotifers. This is because clownfish fry will only eat live food. At some point, you will need to feed the fry live baby brine shrimp. You can buy the brine shrimp eggs online and hatch them. Here is a website with m ore detail http://www.breedclownfish.com/ though it would be nice to tlk to someone who has accomplished it.