You can just boil a few frozen peas. Remove the outer shell and mash up the pea with a little bit of water. It should look like baby food. You can feed small amounts with a toothpick. That's what I did.
Personally, I found raising fry easier in a separate fry tank. I had just a
bare bottom 5g with a sponge filter and heater. This was you can feed the fry as needed. The bare bottom makes it easy to clean with a turkey baster. The small volume also makes it easy to make lots of water changes.
Have fun. Those little babies grow fast!
