Shell erosion or growth?

Help a snail noob out please.

 

erinw347?

 

Looks like growth but the shells rim had been damaged before.

 

Looks like growth but the shells rim had been damaged before.

Thank you. I have only had them for about 2 weeks so want to make sure im not hurting them.

 

Looks like growth to me. Ive noticed Mystery Snails will often have a “growth spurt” if they’re put into an environment with significantly more calcium or food.

 

Looks like growth to me. Ive noticed Mystery Snails will often have a “growth spurt” if they’re put into an environment with significantly more calcium or food.

O awesome. So me moving them from the store tank to my tanks is just giving them more nutrients and such. Good to know.

 

O awesome. So me moving them from the store tank to my tanks is just giving them more nutrients and such. Good to know.

Here is my purple mystery snail about a month after taking him home.