I've also seen this called cotton candy algae on reefcleaners. Ive got it in my DT and fuge. It came in on some chaeto and spread over a few months. I can handle it in the main tank, but the fuge is gonna be harder. Is there a snail or crab that I can put in my fuge to eat it or should I just take all the chaeto out and replace it? Any other suggestions are welcome. Thanks