How to remove algea for gsp to grow?

[Fishcrisp]

Im trying to remove this algea for my gsp,but is not spreading and my guess is the algea. I have had it for 3 months allready and the algea started taking over.

 

[PicassoClown04]

H2O2 dip. 1:1 ratio of H2O2:tank water (1 cup h 1 cup tank for example) for 1-2 minutes then scrub off algae with a toothbrush. Should kill the algae

 

[Fishcrisp]

H2O2 dip. 1:1 ratio of H2O2:tank water (1 cup h 1 cup tank for example) for 1-2 minutes then scrub off algae with a toothbrush. Should kill the algae

I will try that. You know what type of algea is it?

 

[PicassoClown04]

I will try that. You know what type of algea is it?

Looks like brown turf or something. Real fuzzy and difficult to scrape off the rocks. Use a stiff brush and the H2O2 should kill it so it comes off easier