What are these things?

[Jeremy Luke]

I have some strange, orange things growing on my rock and overflow. What the heck is it?

 

[TheEngineer]

Vermetid snails. Harmless to your tank but very sharp so be careful

 

[Jeremy Luke]

Thank you @TheEngineer

 

[TheEngineer]

No problem.

That’s a lot of coralline you’ve got growing there. Have a build thread?

 

[Jeremy Luke]

I do not have a build thread. The tank is about a year and a half old now. The coralline is everywhere accept on the Marco rock