need id please

[hippo!]

no picture yet but they look like "asian hats".
Conical shaped and about 1/8th to 1/4" in size. They are all over rock and some on glass.
Good or bad?
:nervous:

 

[capschamp]

i dont know what they are called, but i have them too. never had any problems due to them from my experiences. i think they are some kind of snail, not 100% sure though.

 

[viper_930]

Chitons maybe?

 

[hippo!]

anybody else?...........

 

[jac913]

I thought they were so cute, but was told they were bad in a tank b/c they would take over. I wish I hadn't gotten rid of them!

 

[hippo!]

jac913 - not sure if that was pro or con
:santa:

 

[bang guy]

Sounds like Limpets.
Do they have a hole in the very top or is it closed?

 

[hippo!]

(looks closed)

once again Bang Guy comes through :cheer:

 

[bang guy]

The ones without the opening (Keyhole) are typically beneficial algae grazers.

 

[hippo!]

here's a pick such as it is...

 

[hippo!]

oops....have to work on that