What kind of algae are these?

[Paul24]

Hello, I would like to know what kind of algae these are? The ones linked to be more specific. They are all over my sand bed and look like brown little hairs. They stick together on the sand so hard to break up.

 

[Idoc]

I'm not exactly sure what type of algae it is, but at least it isn't dinos! I don't see any of those in your pics.

 

[Paul24]

I'm not exactly sure what type of algae it is, but at least it isn't dinos! I don't see any of those in your pics.

I saw one sca and one lca. They definitely aren’t the dominant species in there lol