Duncan won't open

[iloveswfish]

I have had this duncas for about a month. It was opening but now it is closed.

My Parameters

Salinity - 1.024
PH - 8.3
Nitrite - 0
Nitrate - 0
Phos - 0
Calcium -400
KH -9
Amonia - 0

 

[LetItReef]

Check flow and lighting. Our Duncan does not like too much flow and placed where is not getting direct light.

 

[Tab28]

Agree, move it every few days to find where it is happy. Duncans are pretty adaptable. Mine is under medium flow and high lighting. But it took awhile to find its spot. Have had it for over 6 years.

 

[Tahoe61]

My Duncan does not tolerate any other coral touching it.

 

[steve&mari]

Agreed give it some room and move around every few days till find it's happy spot. Low to med light n moderate flow are guidelines.

 

[Shep]

Has anything in your tank changed recently (light, livestock (counting inverts), major water changes, started dosing, etc)? Its always important to look at what has changed when trying to find out why a coral has stopped opening.

 

[iloveswfish]

I will try it but it was opening where it is I just did water change

Nothing has changed

 

[Oceansize]

I have a Duncan that is doing very well, probably better than any other coral in my tank. In 6 months there are 4 new polyps that are all almost full-grown now, it has been a pleasure to watch them come out.

The only difference between your parameters and mine: my salinity is 1.026, my calcium is 450, and my KH is between 7 and 8. Mine has got both pretty good flow and light intensity, higher than what most recommend, and without any issues. I feed mysis shrimp or oyster tissue almost daily.