Anyone know what this algae is? .

[dennism]

Looks like freckles. They started about a month ago with pinpoint spots all over now after a month to 6 weeks it has grown to more of a black looking color. When the light is turned up to 100% white it's a dark burgandy color.
The green I believe is coraline it takes a bit of scratching on the rock to remove.
55 gal
Ph 8.1
Calc 400
Amonia 0
Kh 11dkh
Phosphate less than .25 but greater than 0
Nitrate o

 

[dennism]

Looks like freckles. They started about a month ago with pinpoint spots all over now after a month to 6 weeks it has grown to more of a black looking color. When the light is turned up to 100% white it's a dark burgandy color.
The green I believe is coraline it takes a bit of scratching on the rock to remove.
55 gal
Ph 8.1
Calc 400
Amonia 0
Kh 11dkh
Phosphate less than .25 but greater than 0
Nitrate o

Forgot a pic

 

[Veetz89]

This is new rock. I had this same algae freckles too. It goes through a bunch of color changes until you'll see coralline cover it completely. Took me a whole year of stability.