Duncan coral

jorgeherrera89 · Jul 27, 2018

So I’ve been noticing for the past week 2 of the 3 heads in my Duncan coral has been closed. My level are good except for my magnesium and calium they were low my mag was at 1110 current at 1260, my calcium was at 340 now at 360. Nitrate at 20ppm. I had it at the medium level of tank in my biocube 14g and so today I decided place it in the sand bed maybe it’s the lighting idk. I have an aiprimehd. Please let me know all the other corals are doing just fine. Thank you

Brew12 · Jul 27, 2018

jorgeherrera89 said:
So I’ve been noticing for the past week 2 of the 3 heads in my Duncan coral has been closed. My level are good except for my magnesium and calium they were low my mag was at 1110 current at 1260, my calcium was at 340 now at 360. Nitrate at 20ppm. I had it at the medium level of tank in my biocube 14g and so today I decided place it in the sand bed maybe it’s the lighting idk. I have an aiprimehd. Please let me know all the other corals are doing just fine. Thank you

How much are you spot feeding it, and what are you using?

jorgeherrera89 · Jul 28, 2018

Brew12 said:
How much are you spot feeding it, and what are you using?

I spot feed twice a week on Monday & Friday, I mix brim shrimp with reef roids. Is that the problem? Maybe

Brew12 · Jul 28, 2018

jorgeherrera89 said:
I spot feed twice a week on Monday & Friday, I mix brim shrimp with reef roids. Is that the problem? Maybe

Honestly, I don't know. I'm not an NPS guy. I don't have any coral in my tank that aren't photosynthetic. I just know that with Duncan's it seems light rarely matters since they don't use it much so I would focus on flow and feeding.

Lets see if anyone else in #reefsquad can help with this NPS

Crabs McJones · Jul 28, 2018

Duncan corals aren't NPS, they're fully photosynthetic. They dont need to be fed. @Brew12 I think you're thinking of a sun coral which is an NPS, they do look kind of similar to a duncan :) If its closed up it's either a water quality, lighting, or outside interference issue such as a shrimp messing with it or to much flow. I know mine a couple heads will close up for a few days but then open back up and be just fine. How long as it been like this?

saltyhog · Jul 28, 2018

I was under the impression duncans were photosynthetic?!

Too much flow can definitely affect polyp extension on mine.

No other corals near that could be causing allopathy are there?

Brew12 · Jul 28, 2018

Crabs Mcjones said:
Duncan corals aren't NPS, they're fully photosynthetic. They dont need to be fed. @Brew12 I think you're thinking of a sun coral which is an NPS, they do look kind of similar to a duncan :) If its closed up it's either a water quality, lighting, or outside interference issue such as a shrimp messing with it or to much flow. I know mine a couple heads will close up for a few days but then open back up and be just fine. How long as it been like this?

;Eggonface;Eggonface;Eggonface;Eggonface

Ooops…. So why don't I have one of these in my tank then? :confused: Not sure why I was convinced they were NPS. ;Facepalm

Crabs McJones · Jul 28, 2018

Brew12 said:
;Eggonface;Eggonface;Eggonface;Eggonface

Ooops…. So why don't I have one of these in my tank then? :confused: Not sure why I was convinced they were NPS. ;Facepalm

Where you located, I'll send you a head if youd like, mine is getting huge ;)

Bayareareefer18 · Jul 28, 2018

Crabs Mcjones said:
Where you located, I'll send you a head if youd like, mine is getting huge ;)

Their requirements similar to euphyllias? Definitely want some Duncan's for my next addition

reeferfoxx · Jul 28, 2018

Need to get water parameters in good shape. Even if that isn't the issue, it will help narrow down the cause. Mg above 1350(LPS like mg), Ca above 400(no reason to have any lower), and ALK needs to be monitored. With 20ppm of no3, where does po4 sit?

Crabs McJones · Jul 28, 2018

Bayareareefer18 said:
Their requirements similar to euphyllias? Definitely want some Duncan's for my next addition

Yes, low light low to medium flow, and a little nitrate and phosphate

saltyhog · Jul 28, 2018

One of my favorite LPS!

Jason mack · Jul 28, 2018

jorgeherrera89 said:
So I’ve been noticing for the past week 2 of the 3 heads in my Duncan coral has been closed. My level are good except for my magnesium and calium they were low my mag was at 1110 current at 1260, my calcium was at 340 now at 360. Nitrate at 20ppm. I had it at the medium level of tank in my biocube 14g and so today I decided place it in the sand bed maybe it’s the lighting idk. I have an aiprimehd. Please let me know all the other corals are doing just fine. Thank you

Youve answered Your own question i believe .. magnesium low ... raise that and it will get beter in my opinion !

Idoc · Jul 28, 2018

Brew12 said:
;Eggonface;Eggonface;Eggonface;Eggonface

Ooops…. So why don't I have one of these in my tank then? :confused: Not sure why I was convinced they were NPS. ;Facepalm

I bet I can guess what you will be adding to your tank soon... lol

Diesel · Jul 28, 2018

Can the OP post a pic this Duncan and maybe a FTS?

jorgeherrera89 · Jul 28, 2018

Crabs Mcjones said:
Duncan corals aren't NPS, they're fully photosynthetic. They dont need to be fed. @Brew12 I think you're thinking of a sun coral which is an NPS, they do look kind of similar to a duncan :) If its closed up it's either a water quality, lighting, or outside interference issue such as a shrimp messing with it or to much flow. I know mine a couple heads will close up for a few days but then open back up and be just fine. How long as it been like this?

I moved it to the sand bed with medium flow. It’s been like this since this past Tuesday.

jorgeherrera89 · Jul 28, 2018

Jason mack said:
Youve answered Your own question i believe .. magnesium low ... raise that and it will get beter in my opinion !

I started dosing this Wednesday and I’ve been testing everyday I have to test again this afternoon to see where mag and cal are at. Alk remains at 10ppm

saltyhog · Jul 28, 2018

jorgeherrera89 said:
I started dosing this Wednesday and I’ve been testing everyday I have to test again this afternoon to see where mag and cal are at. Alk remains at 10ppm

Are you sure about your units on your alkalinity? 10ppm translates to a dKh of 0.52 which is not possible!