Help with Algae id

[MrMatt]

Hello,

 

I've had some algae start to take over my rocks and am having difficultly managing it. I was wondering it I could get some help with the id/treatment. I have an idea but I want to hear from people with a bit more experience...

 

Thanks

 

12 gallon Nano

Alk - 9

Ca - 380

NH3/NO2/NO3/ - undetectable

Phosphate - 0.25 (on API test)

Mg - 1240

 

I have attached a picture of one of my rocks to show approximate amount/ a macro picture of an example on my glass.

 

I'll post some more close ups of the algae.

Here are some pictures of the algae under a microscope, sorry for the poor quality.

 

Let me know if more pictures would be useful.