Algae Salad

[Adele]

This looks like a little of everything growing in my tank, hold the croutons. Can some help ID what I’ve got going on here?
Parameters are
Cal 420
Alk 9.6
Mag 1480
pH 8.4
Salinity 35 ppt
Po4 API looks like 0
Temp 77 f
Brown growth started on sand and is pretty well on the top side of all rocks and some is even flapping in the breeze on my overflow box. No bubbles on anything and this has been going on abt 3 weeks now.
Sump is running skimmer, foam sponge and fuge with macro on 4 hours of growstar ufo light. Should I bump up the light schedule maybe to compete with the salad?

 

[Jeepguy242]

Run the fuge all the time the main light in the display is off.

 

[Adele]

How long would you recommend I have lights out in the DT? Until its gone? Can you tell from the scope image what kind of Algae I have going on here?

 

[erky]

how long has the tank been going and what is it stocked with?

 

[Adele]

Over a year, but if you were thinking initial cycle, that's exactly what it looks like, although I think I saw some cyno last night that was was being mistaken as coraline.
Fish: Yellow tang, 4 anthias, Damsel, Six Line, Pygmy Angel, Watchman Goby, Bangaii Cardinal
Coral: Candy cane, Brain, Platygyra, Leptastrea and dying Duncan and a few Zoas.
Dosing BRS 2 part, feeding a mix of Frozen Brine and Mysis, 2-3 x per week. Also use Pellets, flake and Nori. No food ever makes it to the substrate so I am very careful about not overfeeding.