Black sun coral not opening

[jrkayakin]

i have a yellow and a black sun coral. the yellow sun coral opens at feeding time and stays open all night, the black sun coral will not open, is dying???? its not losing its color. any suggestions
ph-8.3
po4-0
no3-0
ca-420
dkh-8
sal.-1.024
temp 78-79.3

[killagoby]

I believe that is a low light coral, correct?

[jrkayakin]

Yes you are correct i have it in my aqupod 12 with 2x27w pc 10k and 50/50

[NanoReefWanabe]

what kind of fish you have and inverts?something may be picking at it..

they are pretty much cave corals like the chilli..next to no light..

how much flow at it?

it may be a case of something irritating it..

[jrkayakin]

No fish, 1 coral banded shrimp, normal carbs and snails, the flow is in a circular motion , its not in a cave but out of direct light as muh as possible, How do i know if its dying?

[wilawalo]

mine does not open much, but sometimes it goes into "hiding" and I move it to somewhere with less light, and it become better.