Snail egg clutch not hatching?

Hi. I had two mystery snail egg clutches got within 2 weeks of each other. I used a homemade incubator and the first egg clutch hatched right at 4 weeks on May 20. And the second clutch still has not hatched, and its been a month since then. I put the unhatched clutch on the glass so it would be less dependent on me if the snails hatch. So does anyone know why its not hatching, or if theirs anything I can do for the clutch to help it?

 

Maybe not fertilized? Or got too dry?

 

Maybe not fertilized? Or got too dry?

I was afraid of that. What should I do with it. Should I leave it there or...

 

I don't want to be overrun so i just grab my clutches of eggs when i find them and throw them away.

 

I don't want to be overrun so i just grab my clutches of eggs when i find them and throw them away.

oh. ok. I have a question though. If the eggs are not going to hatch could I let my baby snails eat the eggs to get some extra calcium?

 

oh. ok. I have a question though. If the eggs are not going to hatch could I let my baby snails eat the eggs to get some extra calcium?

If they eat them, would probably be fine. Just don't know that they would.