Snails Everywhere!?

[EnoOnraefi]

I'm not sure what these snails are and there may be multiple types here but there are a ton of babies all over the sandbed and I just want to be sure that if they are bad they aren't going to get out of control before I can do something about them. Instead of including all the pictures I have added a link to an Imgur thread below.

https://imgur.com/a/LN2rh

Thanks in advance!

 

[DSC reef]

Resembles a baby cerith. Any other snails in the tank?

 

[EnoOnraefi]

I have knowingly added roughly:
10 Cerinth
5 Astraea
5 Nassarius
5 Banded Trochus
2 Mexican Turbo
1 Fighting Conch

I also added some cheto into my sump at one point that wasn't as clean as I had hoped so who knows what could have hitchhiked in on that.

 

[DSC reef]

It's either baby cerith or nassarius.

 

[EnoOnraefi]

Cool deal, I don't mind that at all. I initially thought that they were cerinth but in my little bit of reading, I started to believe that they don't breed well in our tanks.