im not 100% sure the eggs will hatch or if they will make it to adult hood. i could be very wrong about this as i know there are some snails that will and others that wont. right now i dont know if this is one that will or not. i have to look more into it.
regardless i like the stomatalla snails and they will reproduce in home aquariums. i have like a million of them but the good thing is during the day you only see like 5 so its not like im over run, plus they are only cleaning so its good stuff. they look pretty cool too, soft shelled snails.. kinda like slugs.