Duncan Retracting

[kfries]

I have two different Duncans from different suppliers. I had been noticing my Alk running around 7.8-8.0. I bumped up my klak a little and got it up to 8.3-8.4 over a few days. My duncans are both ticked. The larger one got ticked right away and has not opened back up. The smaller one has started to open up a little during the day, but is retracting a lot more than it used to. I have a pretty healthy mixed reef with all kinds of LPS, SPS, and some softies. Everything else is happy. There are no other corals nearby that I can see that would sting them. They are a good distance apart as well, so I do not think anythign is agitating them either. I did read that they are very sensitive to ALK. I had been running around 8.2-8.3 for a while and it slowly drifted down before I brought it up. They have been in the tank 7-8 months and have always looked good until this last week.

 

[kevgib67]

I have two different Duncans from different suppliers. I had been noticing my Alk running around 7.8-8.0. I bumped up my klak a little and got it up to 8.3-8.4 over a few days. My duncans are both ticked. The larger one got ticked right away and has not opened back up. The smaller one has started to open up a little during the day, but is retracting a lot more than it used to. I have a pretty healthy mixed reef with all kinds of LPS, SPS, and some softies. Everything else is happy. There are no other corals nearby that I can see that would sting them. They are a good distance apart as well, so I do not think anythign is agitating them either. I did read that they are very sensitive to ALK. I had been running around 8.2-8.3 for a while and it slowly drifted down before I brought it up. They have been in the tank 7-8 months and have always looked good until this last week.

Pictures?

 

[kfries]

Here is the bigger one. There is a little bit of sand floating around from a goby.

 

[kfries]

Here is the smaller one.

 

[kfries]

 

[kevgib67]

Thank you. You are going to need to get them off the sand and up to where they can receive moderate light and flow. Mine are in the top third of the tank but with different lights it’s hard to compare but it’s at about the same level as my birds nest and torches. Make sure your magnesium and calcium are at the appropriate levels.

 

[kfries]

Thanks for the advice. The smaller one started to open up a little more. I moved the bigger one a lot higher in the tank and making a great recovery. I am trying to figure out a new home for them both higher up.