Help ID Please

[Pico_Libre]

first of all my rocks are about 6 years old I got them from a local shops sump they had all kinds of cool stuff on and in them. This red algae started growing a few weeks ago. Anyone know what it is?

 

[Sophie"s mom]

It’s hard to say, but most macro algae is a good thing.

 

[vetteguy53081]

first of all my rocks are about 6 years old I got them from a local shops sump they had all kinds of cool stuff on and in them. This red algae started growing a few weeks ago. Anyone know what it is?

Looks like a good macroalgae known as ulva

 

[ISpeakForTheSeas]

I struggle with the red algae that look like this, but for a few options:

Possibly Halymenia, Porphyra, or Cryptonemia sp.?