Help my Dendro?

[Red Fish]

My dendro had been growing nicely for over a year, and then I noticed one of the heads was oozing black/green stuff. I blew it off with a pipette and the whole head disintegrated. I have dipped it in Coral Rx, but it still looks sad.
What else can I do?

Thanks for the help!

[trinhgiaphu]

is it your dendro open all the daylight?

[Red Fish]

Yes. It was always open before and now most of the heads are only part way open.

[mark.red]

That stinks man. Never ran into that problem. Ill ask around and get back to you.

[Red Fish]

Thanks!

[ashtree68]

Is it a dendro or sun coral?

Have you changed anything recently? maybe try placing it in a bit of higher flow?

[Red Fish]

Dendro from DD