Help with Duncan Growth

[nlarmann]

I’ve had a Duncan for a half a year is so now, and after a friend over feeding the tank a few things showed up.

There appears to be something new growing on it, but it doesn’t look like a new Duncan head. Additionally, I think there is some sort of black bubble algae, should I just leave that to get it to go away?

I can provide more pictures if needed.

 

[ryanjohn1]

I would try and get that stuff off it

 

[Harpo]

looks like apastasia

 

[Asm481]

I see bryopsis and maybe bubble algae. If you can get it out of 5he tank scrape the skeleton and spray the hard skeleton and mount with hydrogen peroxide.