What are these in my tank?

[Fishn28]

What are these little things in my tank??? They are only seen at night and move extremely slow

 

[fishguy242]

Limpets, good guys...

 

[Kasrift]

Looks like stomatella snails, also good guys. They are most active at night which is also why I think that might be the snail.

 

[Red_Beard]

Ive got the same. Little limpets, easy way to tell, the limpets have a tiny hole at the apex of the shell cone they use for excrement.