Can you give us some more info? How long this has been going on? How recently this was fragged? What are your tank parameters? etc can help us give a differential diagnosis.
Not sure how we can help, need a little more detail to go in right direction...Not sure i have not dosed in a couple of days due to Neptune DDS leaking air in the lines and it is out for RMA with Neptuen
I’m leaning toward this frag not being healthy.
When mine closes up, the skeleton is still covered with tissue.
How old is the frag?
What are your tank parameters?
do you feed it? How and how orften?
How old are the frags next to it?
This is mine when closed.
I checked with my refractometer, It reads 1.027 I brought it up from 1.021 over 2 weeks by letting evaporation occur and refilling with slightly higher Saltwater.I would first double check your salinity. Had this happen more than once due to high salinity from false reading on my instruments. Take a water sample to a trusted LFS and have them verify for you.
Moderate light and water flow also essential in addition to feeding 2x per week.
You just produced the answer to the issues. . . . .I checked with my refractometer, It reads 1.027 I brought it up from 1.021 over 2 weeks by letting evaporation occur and refilling with slightly higher Saltwater.
Frags are from 3/1/2020 purchase from LFS all of them (9) at the same time.
Pictures on my other threads for coral ID help shows them on day one or two in my tank.
Need to check Phos and Nitrate lvls but tank is 7 years old and I have a BRS GFO and Carbon reactor running although I need to test.
Alk is 7.8 ish as of this morning and Calc is 567 a little high but should reduce with no Dosing over the next couple of weeks.
I bought some Reef Chili from BRS and have fed them twice this week.
I adjusted lighting a bit, I am using Ecotech Radon's x 3 at 30 % @ 18k frags are mounted on back side of tank @ 1/3 the way down for around 10 hours ramping down to deep blue for 3 hours.
Never really had much luck with Coral, would like for that to change.
Just one question, By adding slightly higher Saltwater over 2 weeks, I thought that was a safe way to increase Salinity.You just produced the answer to the issues. . . . .
Salt a tad high, bring it down to 1.025-1.026. Hopefully you did not just pour in high salinity seawater. Calcium yes a bit high and no dose will work, and alk is in safe range. Lights may be a bit bright.. . . reduce white intensity a little and you should have Happy Duncans
That is the correct way to raise salinity. You likely caused no harm by doing that. I would try moving the duncan down to the sand bed in low-moderate flow away from everything else and monitor it for a week. This is what I am doing with mine currently and it's starting to peek out a little more every day.Just one question, By adding slightly higher Saltwater over 2 weeks, I thought that was a safe way to increase Salinity.
Total was about 8 gallons per week in 2 doses. Did not seem to bother any of the other livestock. Hopefully this Duncan will recover, do you agree with moving it to a more remote location away from the other corals?