I’d help?

[liongolfer]

I’m sure this is an easy one but what kind of algae is this?

thanks!

 

[liongolfer]

I’m sure this is an easy one but what kind of algae is this?

thanks!

 

[Srfnhooker]

Looks like Ulva. Had it all over my rock work at one point. Picked at it and picked at it. Rocks I could get out I scrubbed after treating with peroxide. It eventually worked it way out over time. I had it for about 4 to 6 months.