For the most part yes. Have tried UV 24/7, hydrogen peroxide, 3 day blackout, dino-x. Started when nitrates and phosphates bottomed out. That was months ago and hasn’t dropped to zero since. Thought I had them licked on the last blackout but they came back.
Need a higher magnification level, i see some Ostreopsis, which is UV, but there might be more than one kind there.
For now you can run UV directly plumbed into the display, at a slow flow rate (2x per hour or so) and add some pods. UV and ostensibly pods wiped out my Ostreopsis in 2 weeks flat. I ran an imporper sized UV for a full month and made some progress, but nothing like my hard plumbed aqua UV. It looks silly, but works well.
Looks like ostreo mixed with some amphidium.
Here is full program:
Prepare by starting with a water change and blow this stuff loose with a turkey baster and siphon up loose particles.
Turn lights off (at least white and run blue at 10-15% IF you have light dependant corals) for 5 days and at night dose 1ml of 3% hydrogen peroxide per 10 gallons for all 5 nights. If you dont have light dependent coral- turn all lights off.
During the day dose 1ml of liquid bacteria (such as bacter 7 or XLM) per 10 gallons.
Clean filters daily and DO NOT FEED CORAL FOODS OR ADD NOPOX as it is food for dinos.
Day 5,, you can start with blue lights - ramping up and work your white lights up slowly
UV. Suck as much as you can every day or other day. I also used a hob filter and blew rocks to get remnants. Take out filter and rinse. Rinse UV pump and filter frequently.
You need to remove as much as possible. UV keeps it from reproducing but does not kill it. You can do it takes a little time.
You want to encourage other algae, gasp hair algae, or diatoms while pulling as mush of this **** out as you can. Feed your fish, they will appreciate it.
I beat in in 6 weeks. You need to get something to out compete it.