Chronic hammer head die off

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Klyph

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I know there’s a lot of similar threads, but trying to figure out what potential root causes are. I had several rather large hammer and 1 frog spawn coral colonies that were thriving for the past couple years. Recently I started having single heads dieing on me. The pattern was always the same. One random head would retract on day 1, start melting on day 2 and 3, and would be completely gone on day 4.

As soon as that one was gone, another random head would start. Not beside each other necessarily. there was no brown jelly. Just a single clean dead head. I’ve been cutting off the dieing and dead heads to try and stop the spread.

I had a fox face, which I was told had to be the culprit. He had a huge appetite in general. The theory was he got the taste for them. So I removed him. There was no die off for several days, so I figured that was it, but it’s starting to happen again. YARGH!!!

my parameters are all fine (9.0 alk, 500 cal, 1300 mag, 1.026 salt, 78 degrees, 8.2 ph, .05 phos, 5 nitrate). Flow and lights aren’t different. I have been spot hitting GHA with hydrogen peroxide a little, but not near the corals in question.

So, what could it be? Is there a pest I should be looking for? I’m almost positive it’s not brown jelly, since I haven’t seen any brown jelly. The head simply melts and falls off clean over the 2-3 days.
 
In Most cases:
Low calcium (under 380)
Too much light
Too high of water currents

bailout is stress related by the above . They require stable conditions and don’t do well in sand as they are easily stressed by particles of sand
 
Hane you noticed the ''random head clearance'' caysed a day or two after feeding the tank or balling any sort of trace elements ?
 
Possible Euphyllia eating flatworm? If you aren’t seeing signs of stress or zooxanthellae excretions, it seems odd for the seemingly random bailout on a mature colony. Are you able to get a close view around the base of the head?

 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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  • Not yet, but I have one that I want to buy in mind!

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  • No.

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