Things growing on wood.. identification?

[ellamay]

I’ve noticed two different things growing on the spider wood in my tank. These little black dots and the light colour stringy bits. I do have black sand which I initially assumed the black bits were but they look slightly smaller and darker than the sand. A lot of it is attached all around the branches too.
I just wanted to check it’s not anything I should be worried about but mostly just interested! Any ideas? ?

 

[Slaphppy7]

I’ve noticed two different things growing on the spider wood in my tank. These little black dots and the light colour stringy bits. I do have black sand which I initially assumed the black bits were but they look slightly smaller and darker than the sand. A lot of it is attached all around the branches too.
I just wanted to check it’s not anything I should be worried about but mostly just interested! Any ideas? ?

Some sort of brown algae or diatoms, is my guess

 

[ellamay]

After some more research im pretty sure the black one is black beard algae. I still can’t work out what the little stringy bits are though

 

[Slaphppy7]

After some more research im pretty sure the black one is black beard algae. I still can’t work out what the little stringy bits are though

They almost look like roots...