Algae id.

[Darylb]

What algae is this

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[mr_X]

I'm guessing Halimenia Floridana.

 

[Fishheaven123]

May be Gracilaria curtissae
Common:Red Macroalgae or Ruby Red Algae.

 

[Darylb]

Woukd it be good for nitrate removal

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[54seaweed]

Marine Plants in the Aquarium

agree with X
the above link should answer any questions you may have on this macro algae
a lot of herbivorous fish will enjoy munching on it as a snack