ID this algae?

[Aaron75]

Brown fuzzy algae that i can isolate to have originated from 1 frag i got. It spreads simply by growing and grows like a mat. In light, it looks kind of fuzzy, after lights it shrinks into tiny pores. On a frag plug it feels like mucus. Any ID's? Trying to see how i should eliminate it.

 

[Gumbies R Us]

Are you able to get clearer photos and some under white lights?