What is this algae?

[jordanrb]

My tank had an algae breakout last week, almost overnight. I have been vacuuming the sand and doing 20% water changes every few days and it comes back the next day.

Any idea what it is and how to get rid of it?

Tank is 8 months old. Parameters are steady.

 

[BryanM]

Look at that feather duster!

Sorry, I do not know the answer for your algae question.