Rollercoaster Hammer

JakeH

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Hoping to get some insight into what is happening to my hammer. Admittedly my husbandry has not been great over the last few months.

Several of its heads are losing color and retracting. There does appear to be something other than new heads sprouting up on the skeleton.


20250604_212558.png


20250604_212606.png


The hammer was grown from the crater of a failed frag. What I mean is that, I had a frag originally where this colony is growing..it didn’t do well and looked dead so I popped it off the rock and forgot about it. Months later this colony began growing like a phoenix rising from the ashes of the now long gone frag.


20250604_212403.png



Anyway, I’d really like to see this hammer recover since it has a neat story in my tank.

What am I dealing with? Goby irritating it? Flatworms? I’m not too worried about water parameters because half the coral and the rest of the tank seem content.

Thanks in advance,
 

Catawba_Valley_Reef

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Things I would look at:

Is it getting too much flow?
Is it getting enough light or too much?
Are there enough nitrates/phosphates in the water?

Dip it in potassium chloride and see if any flatworms come off.

My first thought when looking at the pic was the Goby…and wondering if it was causing the coral to close.
 

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