no idea really but would chopped earthworm work? if cut really small? what about fruit flies? you can cultivate these yourself by putting some fruit on the window sill in a empty cricket tub( don't empty out the dead crickets or dirt it helps!) even in the winter this will work...catch em and pull off the wings...then throw them on top of the water..
might be way off track though as i have never even seen fire babies but i love the adults!!:smile: