What is this????

jnj97 · Mar 3, 2016

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

AllSignsPointToFish · Mar 3, 2016

Kind of looks like green hair algae.

scardall · Mar 3, 2016

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

human · Mar 3, 2016

Bryopsis

djbetterly · Mar 3, 2016

pretty sure thats bryopsis

aaron23 · Mar 3, 2016

Bryopsis agree with other posters

BigJohnny · Mar 4, 2016

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 · Mar 4, 2016

scardall said:
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 · Mar 4, 2016

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.