Algae on a Zoa and best treatment

[Hardboiled]

Hi,

The Zoa frag has algae on it that appears to originate from this frag. The frag has been in my tank for 4+ months, I'm just now noticing the extra growth of this algae. It doesn't appear anywhere else in the tank (yet). Can someone help me ID this algae? What is the best treatment for something so local, but intertwined? Can the Zoa handle a mild hydrogen peroxide dip that might kill the algae, but not the Zoa?

Thanks for any help on this.
Tom

 

[Quietman]

Looks like some type of filamentous algae (catchall GHA).

Some zoas handle an H2O2 dip just fine (especially if you don't just drop it in but try and be a bit surgical with it). Justin Credabel's schedule has zoas at the highest concentration (210-235ml/liter DI) but I might start lower at half that. I've had good luck with dipping.

Also, astraea snails are very good at between the polyps cleaning and there's always careful manual removal with tweezers (which I am terrible at).