As plankton said
That is, in my opinion, the only downside with nerite snails: they love to lay their single eggs e-v-e-r-y-w-h-e-r-e and they're stuck on not just with superglue but super-duper-extra-superglue.
Once found some described as 'seashell nerites', some type of horned shell, and their egg laying was not so prolific.