duncan excreting yellow stuff

[reefndude]

Duncan seems ok. Will open up for a few days but never completely. Sometimes he excretes yellow stuff. Is this normal? Will stay closed for a few days or more. Been in my tank since Jan 31st.

 

[smtank]

Could be expelling zooxanthellae.

Parameters listed as well as lighting will help with troubleshooting the issue.

For me Duncans are usually the first coral that displays signs of stress when there is an issue with the tank.

 

[reefndude]

75 gallon with 40 gallon sump/refugium
Ph:8.0-8.1
Ammonia: 0
Nitrite: 0
Nitrate:0
Calcium: 440
Kh: 9 161.1
Phosphate: 0.25
Mag: lfs tested 2 weeks ago. 1350
6 bulb t5 fixture
ATI blue plus x2
UVL actinic white x2
UVL super actinic x2

 

[reefndude]

Not running a skimmer... Is on my wish list.

 

[reefndude]

O yea... Salinity 1.025

 

[reefndude]

I guess he had to poop. Most I've seen him open. Looks great!