Wall hammer. No the tissue is receding. Check alk. Salinity. Temp.
Make sure cal and mag are correct as well.
A small water change usually restores these numbers and balance.
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I just did a water change and added a trace elements supplement along with alk. So I will continue to add these supplements and small water changes over the next bit. Thanks for the help! This should help the tissue restore/come back out? Thanks
With stability and the proper water chemistry numbers yes it should recover. Slowly.
Lower light and lower flow is usually recommended for healing corals.
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