Help ID good or bad please

EuphylliaFamily

New member
Tank is 5 1/2 weeks old, nutrisea water, life rock (not live), live sand. Was looking at my glass today and found two feather duster looking things attached to the glass. They are very light brown. I'm already ruling out pulsing Xenia, anthelia or aiptasia. I just cannot see that happening or I already know what that looks like. I messaged a couple people they are saying these two are just filter feeders I just don't want it becoming a nuisance in a tank and if it's good or bad, please help thanks. Attached is 2 pics and a small video

c7c27aaa8e81d34cc706e35a6ff8dc2b.jpg

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https://vimeo.com/160035765
 
Agreed. anyway you could snap a better micro shot? Just going off blind, could be hydroids, could be filament algae, could be very small aiptasia. I don't believe they are worms because the species that typically colonize like this leave a tiny calcium carbonate tube. Very noticeable and I didn't see you mention that.
 
The only reason why I wanna say no to that is it has a white stem when I see it on the backside of the glass and acts more like a feather duster when in the water.

My hair algae was very similar, i was sure it was bryopsis. But it went away eventually after i removed the sand and added some CUC
 
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