What do you feed baby bettas?
Microworms, vinegar eels, baby brime shrimp, and egg yolk.
If you look at the size of a Bettas tiny mouth, and then engage your brain, you will see that frozen snails are not, and could not possibly be, a proper food for Bettas. Bettas are 'insectivors'. There are special foods available for Bettas and a weekly treat of something 'Live" like brine shrimp is good too.