Found something on my glass

[degbowl]

I found a couple of snail looking things crawling on my glass. They must of come from the LR. They are white as LR or the sand. Very small almost the size of a pebble. I will try to take a picture later. If they are some kind of snails then I should have nothing to worry about. Am I right? I have plenty of algae for them to eat. Please let me know if anyone has any ideas of what they are. If you can understand what I described. Thanks!
Jim

 

[Fluff]

Could be stomatella varia. Pretty common hitchhikers and a great algae eater.