Any updates?
I don't want to hijack your thread, I just noticed the algae you pictured is the same as what I have living in my tank and am curious if your tactics of removal are working.
I had the exact same algae start growing on my glass also. New tank (80g)was an upgrade from smaller one, using 1/2 dry and 1/2 live rock from my previous sysytem. Fish were added 2 weeks prior to noticing algae and nothing new was added. I had no algae like this in my 2 holding tanks that were running for about a year. I am confused, because people are saying this algae is Bryopsis, yet in my tank, my Tomini Tang, Scopas Tang, Algae Blenny and Cherub Angel were all mowing this stuff down and I thought nothing touches Bryopsis. But, a week later, the first 3 fish died within 12 hours of each other after showing no signs of illness. The Cherub died a week later. After researching this for days, I attributed the fish deaths to toxic dinos, as I noticed all 4 of these fish were feeding in the areas of the dinos that popped up. The only fish remaining are 2 wrasses. I increased nitrates and phosphates after researching the dinos so other algaes could out compete the dinos, added a UV filter and it appears to be working on the dinos. This algae like you show in your photos now is growing only on the upper tops of my tonga branch structure in high flow, and the "feathers" are 1-2" long. I am curious if this really is Bryopsis or not.