White stringy substance

[New2reefers]

This white substance is growing on all rocks, sand bed and walls. All water testing done by local aquarium shop and is within tolerances. Any help identifying what this is and how to eradicate it would be greatly appreciated.

 

[Sharkbait19]

It’s some type of hair algae I believe.
Best thing to do is have a good cuc to keep it from spreading too much.