Fast white snail with dots....kinda pretty

[wingster]

Hi all,
I hope you can help me with this snail. It is tiny, smaller than dime size but extremely fast. I only saw it briefly. I think it came in with my Pico Pack (which I love) from Gulfliverock. I checked their site's hitchhiker list but didn't see it. I hope you can help so I have an idea if it will stay small or grow to large for my tank.
TIA
Birgit

PS: Will post some pics of my first tank in the build section. Cycle is done yay

 

[Idoc]

Looks like a Marginella Snail. They clean up left over food in your tank...it should be a good one.