What is this????

[jnj97]

I need help identifying this. Its growing in a new tank about 2 months old. I've never seen it before

 

[AllSignsPointToFish]

Kind of looks like green hair algae.

 

[scardall]

not green hair algae.Might be a type of macro algae that similar to this.
Norwegian Seaweed

 

[human]

Bryopsis

 

[djbetterly]

pretty sure thats bryopsis

 

[aaron23]

Bryopsis agree with other posters

 

[BigJohnny]

It's bryopsis. Slowly raising your mag up to 1400-1600 has helped people before. Also some swear by using Kent marine tech - m to to do it (for some unknown additives that also help in addition to increasing mag). Don't do anything drastic unless it's spreading.

 

[AllSignsPointToFish]

not green hair algae.Might be a type of macro algae that similar to this.
Norwegian Seaweed

I had some of this in my tank. My tang didn't let it last very long. :)

 

[DeniseAndy]

Pluck it out asap though. This stuff spreads fast if not kept in check. I can wipe out corals. I deal with it regularly after I introduced it accidentally. I tried so much to get rid of it, but I think my UAS (upflow algae scrubber) has done the most to keep it at bay. I also drip peroxide on areas if needed too.

If it wasn't such a pest, it would be quite pretty. :)

Oh, nothing I found eats it. Tangs, seaslugs, emeralds, nothing I have tried anyway.