I would suggest not to feed the snails your betta food. This doesnt mean you CANT. Try getting Tropical fish food and let them sink to the bottom of the tank, also if there is a betta in the tank dont worry because i found that most betta will chew the flakes and spit them out.
oh man i just threw away fish food so its ok to feed them betta food?
Yea but the betta will probably eat it before it falls to the bottom.
To solve this i would soak the pellets for about 2-3 minutes and when you put them in the tank make sure you squeeze them because that way they will fall to the bottom.