Algae problem?

[kinggshakk]

Hello, I am new to reef keeping and I noticed some type of black and red stuff on my sandbed and rocks. I’m guessing it’s some time of algae. The black one seems to have small bubbles with hair floating on it. What could it be and how can I get rid of it ? Could it still be cycling? I had the tank up for about 4 months

 

[blaxsun]

Anything in the tank? Fish, inverts, corals? Are you ghost feeding at all? Some of the red stuff could actually be purple coralline, but I can't really tell. Not sure about the darker black stuff (brown?)

 

[mdb_talon]

The purple on the left side of that main rock looks like it could be cyano. Not unusual in a new tank as it matures, but does not really mean it is still cycling.

 

[Blake423]

If it is red and film like and have bubble, probably cyano. Cyano is bacterial, not algae. Maybe just siphon the sand bed to clean it.
Those "black one" like kind of brown from the pics? Probably diatom. Conch snail may help.