White Circled? Eggs? Sacks?

[Blakjax]

I’ve begun to notice these white things growing. They are only present on one side of my tank. They are growing on the black plastic corner overflows and I have some fake magnetic rocks on the back of the tank anyone know what they are? Snails?

 

[Saltyreef]

Snail eggs.
If tiny snails moving around they would be collonista snails.

 

[Maritimer]

Do you have any nerite snails?

They lay discrete white-shelled eggs, which, IIRC, rarely hatch.

~B.

 

[Dolphins18]

Dwarf Angel heaven