Constructive Scarlet Shrimp?

[orzeljo609]

Hey guys/gals

What are chances that my scarlet shrimp is moving rocks around in the night. I didn't have a problem with things being moved until the weekend when I added a new scarlet shrimp.

 

[Bifferwine]

I don't think it's common for them to move rocks. I haven't heard of that happening.