My Black molly has given birth. The babies have their egg-sacks still and seem very weak. One of the fry's egg-sack got stuck in the mom for 30 minutes, the fry died, but the mom has had no more babies since. This leads me to believe that she has aborted her babies, She seems fine but the babies that were already born are dying of very quickly. I only have 4 little fry left. The babies have been separated from the other fish but aren't moving or swimming a lot. Any advice on how to help/save them would be great