Is this Ulva growing? ID

[starypotter]

Hi everyone,
I have some ulva that I always bring back from the ocean to put in my tank. I noticed that I've got some tiny little... medallions starting to grow on my overflow box. It looks like when mushrooms grow up trees but the little medallions look like ulva.
I can't get better pictures of the overflow box because it's at the back of the tank and covered with rocks but I plucked this little one, and the other picture is of one that's a bit bigger than the medallion, I'm pretty sure it's ulva just looking to confirm.

 

[WV Reefer]

Hi everyone,
I have some ulva that I always bring back from the ocean to put in my tank. I noticed that I've got some tiny little... medallions starting to grow on my overflow box. It looks like when mushrooms grow up trees but the little medallions look like ulva.
I can't get better pictures of the overflow box because it's at the back of the tank and covered with rocks but I plucked this little one, and the other picture is of one that's a bit bigger than the medallion, I'm pretty sure it's ulva just looking to confirm.

I have the same thing growing up high in my 75 Gallon..... I always assumed it was ulva. Interested to see if that’s the case.

 

[starypotter]

I have the same thing growing up high in my 75 Gallon..... I always assumed it was ulva. Interested to see if that’s the case.

I'm hoping we can both get an answer then, if I wasn't having other algae problems I'd probably just say it's ulva and call it a day.

 

[Dancingmad]

Used to pop up everywhere - he is my wall of Ulva algae when this tank was fallow under 6500ks. Herbies chewed through it in no time once introduced. I heard it was Om nominal!

 

[starypotter]

Used to pop up everywhere - he is my wall of Ulva algae when this tank was fallow under 6500ks. Herbies chewed through it in no time once introduced. I heard it was Om nominal!

Looks tasty!