Hard to remove algae. Photo and micro pics.

[PigDaddyF15E]

Currently have some hard to remove algae on my feather duster. It's been a while...but I remember it growing on some other piece of rockwork and I thought I had eliminated it. Unlike hair algae (which I have plenty) this stuff will not pull or brush off. It is very firmly attached to the feather duster and I don't want to pull harder for fear of tearing the "tube" on the worm. I took some photos with my phone as well as some microscope pics. Visually it looks like it's brownish/green and seems to be branching...not straight like hair algae. It does look "straight" though under the microscope

FYI. I ran a course of chemiclean about 5 weeks ago for cyano...obviously no effect on this stuff.

Any thoughts on type? Bryopsis? If so Flucazole? which I have done a couple of times before....

How to get rid of based on it growing on a feather duster? special considerations?

 

[Lavey29]

If it is straight and the tips have a fern like appearance that may indicate briopsis. With GHA in the tank raising magnesium to 1500 weakens it and turns ends white making it easier to get rid of.

I would take the duster out of the tank and remove algae if possible before it spreads. Maybe spot spray peroxide but I'd rather lose a duster then have briopsis in the tank.