Brown Algae

[Sylvester]

Any help would be great
Cal 470
Mag 1260
All 7.4
N03 0.04
N04 -0

Throughout the night is goes away but as soon as the lights come on it’s party time for this algae.
Tank has been up for about 10 months and all was good up until I dropped in some new frags.
Thanks in advance

 

[Reefer40b]

You may have dinos, huge thread on this!