New phone, who dis?

[Sean Clark]

Mushroom rock in the sump has macro algae growing on it. What kind of algae is it... I have my opinion but I am seeking out some professional help to make sure.

Good guy. Keep it.
Or
Kill it. Kill it with fire.

 

[tbrown]

Looks like a freshwater plant - Hornwort.

Maybe Rhipocephalus phoenix?

Sorry, I'm not a professional though.

 

[Reefer Matt]

Looks like byropsis to me.

 

[vetteguy53081]

I see Derbesia which is similar to bryopsis and an algae you dont want as , once it takes root, will continue to grow then spread