Duncan closed

[CPdude]

Hi everyone, I got this duncan coral for a few weeks now and it used to be extremely healthy and will fully open and accept food. But they've been closed like this for a few days. I relocated it once to a shady spot when i saw this, but then after some research,put it back in its original spot where there is medium flow and medium lighting. My parameters are 0 ammonia, 0 nitrites and about 10-15 nitrates, pH 8.0. One of the heads semi opened with swelled up tentacles like in the pic and actually accepted food once. The other one... Is it dead? Its been deeply retracted till i can see the skeleton and I think a little bit of the flesh came off and is exposing the skeleton. Any help is greatly appreciated. Thanks!

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[Dew reefing]

This was mine and it lived

 

[Mark9]

ca & kh?

 

[CPdude]

This was mine and it lived

Wow. What did you do to improve its survival rates??

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[Pond Boy]

Looks a bit close to the other coral in the pic kinda hard to tell though. It may be sending out sweepers at night check late at night with a flash light..