Duncan Help....Urgent

[km1das]

Hello, I will try to upload/attach my pictures as well, but I have a few Duncans in my reef and they are all closed up and have been for a few days. Only one of them is out, but even that looks unhappy. For the past few weeks my Duncans and all corals have been thriving. But now my Duncans are looking all blotchy on the skeleton. All my other corals are still thriving.
Water params:
SG: 1.025
Ph: 8.3
Ammonia: 0
Nitrite: 0
Nitrate: 0
Calcium: 380
Alkalinity: 12

I know my alk is high and my calcium is low, but I do not believe that these should be causing this. Please help me. Thanks.

 

[ReddyW]

My guess is alk. Mine get more angry than normal when alk is 10+dKH. Mine seem to prefer 7.5 - 8.

The one thing that always wakes mine up is food. Cyclopeeze makes all my corals open up.

Why is your alk at 12? Are you using Reef Crystals?

It's unlikely this will hurt them. Duncans are tough. Feed them some mysis when they open up again and they'll forget all about it.