Algae ID?

ErikVR · Jul 11, 2024

Hi all,

Some kind of green/brown hair like algae have taken over my tank recently.
Can someone with more experience please help me ID them?

My no3 is at 11 and my po4 at 1.1.
Running a refugium and skimmer.
They are soft and I can remove them with a toothbrush but they are back fully alter a day.

Photo and video under pure white light only:

tmcca · Jul 11, 2024

Looks like Bryopsis I am afraid. Do you have microscope? Or not can get a cheap one that will help id for sure.

ErikVR · Jul 11, 2024

tmcca said:
Looks like Bryopsis I am afraid. Do you have microscope? Or not can get a cheap one that will help id for sure.

I currently don’t have one but I’m starting to think I should really get one.

All the images of bryopsis I find online seem way more concentrated in thick patches instead of a thin layer all over the place. But it does look like it.