How old are they now? I cant tell clearly from the picture but they look like they are free swimming without the eggs sack (having a large belly), so at this size you can feed them....
Newly hatched brine shrimp
Cyclops
Brine shrimp eggs (decapsulated you want)
Or you can feed normal cichlid pellets, but use a pill crusher, or two spoons to crush a pellet into a fine powder.
Feed upto 4 times a day and do daily water changes to keep the water clean, fry make a lot of mess.