strange green algae?

[Tanked]

Anyone know what type of algae that is growing on my crushed coral? Any help is appreciated.

 

[Murfman]

That is Cyanobacteria. It comes in many colors, from bright red to almost black.

 

[Dave3112]

That is Cyanobacteria. It comes in many colors, from bright red to almost black.

+1 to Cyano

 

[Tanked]

Thanks to all. I always thought it was red.​

 

[steamer51]

If it is the same as the dark red that I had it comes off easily. I used an old piece of airline tubing as a syphon and sucked it off the rocks into a bucket doing a small water change. Kind of like a tiny vacuum cleaner. Some snails will eat it as well. Once when I let it go for a couple of weeks the cyano choked out and killed a small aiptasia that was growing on the same rock which was pretty cool.