Finely crushed flake or pellet food, newly hatched brineshrimp, or a product called golden pearls you can get through http://www.kensfish.com Or you can jsut leave them alone and whoever lives, lives. Just do not disturb the parents or they may very well eat the fry. I disagree with many people about a 10gallon not being very suitable for a pair of rams. I feel as long as its got enough cover and plants that its one of the best choices, granted a 20 long would be much more suitable, but a 10 is fine. Many breeders breed and let the parents raise the fry in 10gals.