Care for Killi Fry?

Hey, quick question on Norman Lamp Eye killi fish, what do you guys feed the babies?

I decided to round up all the babies and put them into their own 1 gallon tank. I was told to crush flake food and make a paste but they're not eating it.

I usually just leave them in the same tank as the adults as it is extremely hard to catch something small in a Fluval Edge.

Any ideas? I got some Twain Moss in the tank and an air stone, that it.