Tiny Snails Good or Bad?

[Mahawka]

I had to take one out inorder to take a photo of it. For a size reference Photo number 2 was taken on top of a Toonie.

[SteveCGY]

Defiantly not what I have but looks like a turbo or Astraea snail to me.

[Mahawka]

Bump! Any thoughts ?

[Proteus]

Colonista snail. Completely harmless but can multiply fast if food source is available

[hillegom]

I have lots of these for quite a long time. Never, in my estimation, too many.
They are part of a cleanup crew, but will happily munch on algae on my glass as well.
Could be unsightly to some, but I like them. lol

[toytech]

If there stuck on they can also be spiral worms , harmless little filter feeders.

[Mahawka]

they are not worms for sure. It's a shell.

Thanks for all the info. I will keep them in my tank.