If you can find it, Tetramin fry food, or Hikari First Bites are best for the first few weeks. Or you can use Baby Brine Shrimp, but it's best to just supplement with that. After they grow a little, you can move on to finely crushed flakes, and freeze-dried, frozen or live Bloodworms, Brine Shrimp, Daphnia...etc. As they grow, you can keep feeding them these things, and whatever else you feed your fish, just crush it up for them. Also, if possible, it's best if you can feed them at least 3 times a day. They have small stomachs, and it goes through them faster then it goes through an adult.
I'm guessing the tank they are in is cycled? Babies are sensitive to water quality, so just be careful. They need frequent water changes. You can use a turkey baster, or make a syphon out of airline tubing to make sure you don't suck up the babies. Or use a regfular syphon, and just be very very careful. You can try shining a light on one side of the tank. Most babies will either go towards the light, or away from it, so just vaccuum where they aren't! Also, the filter could be another problem...sponge filters are the best, but if you have another filter, you can usually fashion something so the babies cannot be sucked in.
Good luck and Congrats!
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