Saving anthelia after sudden crash

MattieH

Member
My tank is about 15 months old. It's a mixed tank so far, with a little bit of everything. I added a small frag of anthelia about four months ago, placed it on a rock in the sand bed. It has grown wildly. It looked great, tan and long, until yesterday. But yesterday morning it started losing fronds, and by last night it was a sickly grey and had mostly fallen apart.

I can't figure this out. Everything else in the tank is fine - softies, LPS, SPS, fish and inverts. Parameters are very steady - they are the exact same today as they have been for some time.

The only recent changes are that I added a starry blenny a few weeks ago who has taken to sitting on the anthelia from time to time. But he's been doing that since I introduced him. He also sits in the other corals without any noticeable issues. Also, I stopped dosing trace elements and iodine about a week ago because I am getting a small cyano creep that I wanted to head off at the pass.

I've attached a pic of what it looked like a few days ago, and what it looks like now.

Any ideas? I'd like to salvage what's left and regrow it, if at all possible. Any ideas would be appreciated!
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I actually had an anthelia and a whole pod of palys completely disappear in the same manner, about 6 months apart. Everything else in the tank was fine on both occasions. I just figured it was some sort of bacteria or disease that did it.
 
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