Duncans closed up for a few days

[PeakeAquaculture]

Hello everyone,
My Duncan's were looking amazing have been in my tank for 3-5 weeks depending on the specific one. 2 days ago I woke up and they were all closed up and have been slightly opening but barley. Most of the time they are closed up tight. I haven't changed anything or added anything new to the tank. Lighting and salt mix have all stayed the same. All my levels seem to be good as seen below. I'm just not sure if there is something I am missing as it seems to only be affecting my Duncan's.


Calcium 514 ppm
Phosphate 0.10 ppm
Alkalinity 8.4 dkh
Temperature 77.8°F
PH 8.2
Salinity 35.4 ppt

 

[itsken37]

calcium looks a little high and what is you magnesium, ammonia nitrite and nitrate?

 

[Sam816]

Move it to slow flow and low light area & see if it opens up. if it does then u have your answer.
If it still stays closed then you water is the issue. Mix a fresh batch of saltwater in a container and move it (after acclimating) it to that container. use a small pump to gently move water. a small light /lamp will help too. if it opens then u have your answer.
It is usually not a good idea to change your parameters just for one coral. it might backfire and rest of your corals might get unhappy.

 

[PeakeAquaculture]

calcium looks a little high and what is you magnesium, ammonia nitrite and nitrate?

I can get those numbers up in a bit.

 

[PeakeAquaculture]

Move it to slow flow and low light area & see if it opens up. if it does then u have your answer.
If it still stays closed then you water is the issue. Mix a fresh batch of saltwater in a container and move it (after acclimating) it to that container. use a small pump to gently move water. a small light /lamp will help too. if it opens then u have your answer.
It is usually not a good idea to change your parameters just for one coral. it might backfire and rest of your corals might get unhappy.

Okay this I can do, if they do open up what should I do? I can't just leave them in a bucket. Just do larger water changes till everything evens out?

 

[vetteguy53081]

Moderate light and water flow. They do best mid tank.

Assure you are in range:

Temperature 77-79
salinity 1.025
ph 8.1-8.3
nitrate < .04
phosphate < .04
Ammonia < .03
mag 1300
CA 440
alk 8-9

 

[Sam816]

Okay this I can do, if they do open up what should I do? I can't just leave them in a bucket. Just do larger water changes till everything evens out?

it's a bit tricky. you might get ur duncan happy but other corals might not like a large water change. try to acclimate it slowly to your tank's parameters. while doing multiple water changes over a period of a week or 2. meet midway & everyone will be happy