Foxface&urchin with macroalgae

I have a tank with a foxface, emerald crabs, and an urchin. Are there any macro algae they won't eat?
This would be considered salad. One macroalgae that would work is Codium
 
in my experience, emeralds love macros of all types. . . I assume the same is true of herbivorous fish. That said, the cordium and Helmedia suggestions might work, maybe some other really tough calcareous macros. . . not sure what those would be haha
 
You could try Mermaid's fans. They are very calcified. Bottle Brush, Pencil Cap, maybe. Halimeda might also work. Codium might persist enough.

How many urchins and what kind? My tuxedo urchin would munch on Codium but not fast enough to kill it off.
 
You could try Mermaid's fans. They are very calcified. Bottle Brush, Pencil Cap, maybe. Halimeda might also work. Codium might persist enough.

How many urchins and what kind? My tuxedo urchin would munch on Codium but not fast enough to kill it off.
I have one pincushion urchin.
 
I'd try a mermaid fan, penci cap or Xmas tree, some halimeda and codium. See what lives.

My suspicion is that the mermaid fan and pencil cap/xmas tree will get knocked over unless it is well rooted, the urchin might take down the halimeda and the codium might persist if you have a big enough ball and it is well-fastened to a rock.
 
I have ulva and gracilaria from ISPF in my tank, and it has no issues with my emerald crabs and tuxedo urchin. To be honest the tuxedo only eats coralline and ignores all other algae (except for decorating itself).
 
I have ulva and gracilaria from ISPF in my tank, and it has no issues with my emerald crabs and tuxedo urchin. To be honest the tuxedo only eats coralline and ignores all other algae (except for decorating itself).

But he has a foxface which will thank him for the salad buffet of those two.
 
correct me if im wrong... but culerpa is so invasive and bad because nothing eats it....
Do foxfaces eat culerpa? oh wait your in Cali... so [X] that... seeing how its illegal to import almost all of them to our state.
 

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