If you haven't made any provisions thus far, you may not be able to do much. For raising babies, you need to have some green water and various stages of critter for feeding. I've heard of some being able to get a few to come out using vitamins like selcon and getting a rush order of smaller brine and other tiny critters. Once they hatch, you'd want to remove them from the tank to keep them from predation either by other fish or pumps. You don't want to use a net for this, though. If you can find a copy of Joyce Wilkerson's Clownfish, check it out as it has a lot of fundamental info on raising them. Anythony34 in MTRC had some he was trying to raise. You may be able to get him to try to raise them for you, depending on where he is in his setup. Matt from ETRC has a 'farm' for his babies, so he may have some good ideas for a quick method to get them food. I think you've likely got a few days to get things figured out. Good luck. BTW, what kind of clowns are they?