beard

Hi Guys,   The stuff attached in the picture has been growing in my planted discus tank. What is it? And how do I treat it?   Best wishes,   Cameron

I recently started seeing lots of black hair beard algae all over my plants and some on my filters and I think it is developing on my walls. I have a 20 long, aqueon LED lights, I dose Flourish, I have Co2. What should I stop doing/start doing? Thanks