ID and Help?

[Shy519]

What kind of algae is this? It's been like this for a couple months and I'm not sure what is going on in this tank. So what is it and what can I do about it?
Ammonia - 0.25
Nitrate - 0
Nitrite - 0
pH - 8
Phosphate - 0.50
dKH - 6
Calcium - 460
Magnesium - 1470
Salinity - 0.024
Temp - 78°

 

[Dr. Reef Verified Sponsor]

Its common green hair algea.
Requires nitrates phosphate and lots of light to grow.
I would reduce nitrates down to 5-10ppm phos 0.01-0.05 and cut out hours on lights.
You can try 3 days black out to kill some or most of it.