Help identifying white circles

[Ironclad]

Can someone help me with identifying what these white circles are on my reef tank. The tank is a 20g long and has been up for about 5 months. They are on the glass on the side of the tank and come off easily enough.

 

[fishguy242]

nerite snail eggs

 

[Ironclad]

Worth keeping or should I scrape them off?

 

[Katrina71]

I'd keep them