Algae on hardscape and Epiphytes

[j.smet78]

Good evening,
Since a year i picked up the hobby again with a 60p.
It runs on co2 inline diffuser, Chihiros wrgb II 60 10th aniversary, Eheim pro 3 250. 7hrs 30 min light, RGB 80-60-80.
Chihiros dosing pump with Masterline micro 2ml/d, macro 2ml/d and carbo 2ml/d
Gh 5, Kh 2, K >15, No3 <10, Po4 <0.2
No matter what i do i always seem to get green hair algae on the hardscape materials, which i can clean off with a brush but it's annoying.
What botters me the most is that it seems i can't keep any epiphyte plants like annubias or narrow leaf. They always become smothered with algae. I trim away the infected leafs but at a certain point there are no more leafs to trim anymore.
What i'm i doing wrong?

 

[FrozenShivers]

Happy to be corrected, but I think many epiphytes can often have a dusting of algae on them due to being slow growers. That's a lot of light you're sending their way, is it an epiphyte only tank? If so my first port of call would be to lower your intensity and seeing how it affects them. Are they well positioned? Can you put them in more shaded areas of the tank perhaps? Do you have an image of the tank so we can see?