Frozen daphnia cubes, brine shrimp cubes, infusoria, you could even crush up your pellets that ya feed the adults into almost a powder. Are the fry with the parents still or are they seperated already? If they are still with the parents id just feed the parents and let them crush up the food for their babies.
Yeah I'd personally just feed the parents a few extra times a day so they can feed their young on their own. Either that or you could go with the other foods I listed before as those should work as well, just thaw em out in a cup of water before dumping it over top of where the fry are.