ID Please

[theishkid]

Can anyone please help me out with this. It’s been this way about 3 weeks. I had to take a large piece of rock out and put in a new very well washed in rodi piece of Marco rock. It started a couple of days later. I thought it was hair algae at first but now starting to think it’s a green cyano.

 

[vetteguy53081]

I see both calothrix and poriferan sponge
The sponge, expose to air. Calothrix, scrub off with a firm toothbrush and reduce white light intensity

 

[theishkid]

Thank you!