Duncan problems ?

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Hi All

Water parameters are all really good, however couple of weeks ago a purchased a healthy looking Duncan, polyps stayed in but after a few days of acclimation they came out and looked healthy. Few days after this the polyps went in and kind of never really properly came back out, presumed as water is all testing good maybe it doesn’t like its position on the sand bed, yesterday I moved him a bit higher up not quite mid way - medium light, light flow. I noticed on the stem it looks like it’s skins peeling ? I’ve seen a few posts with people having this with Duncan’s and usually it’s before it starts go get a new head ?. The only thing that’s changed is my Salt I’ve switched from Red Sea Salt to Red Sea Coral Pro around a week ago. Water changes are done without fail weekly @ 25l in a 165l tank ... anyone any ideas I really hope this isn’t the start of any bleaching

Asco1104

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Reply #1

That doesn’t look good I’m afraid, the skin dosnt peel when a new head appears, you just see a head pick out from the base of a Old head.

When you say parameters are ok what are they?
I could be the change over in salt, Red Sea salt has a alk of 8  and pro is nearer 11 so could have had a big swing in a short period wich would cause stress.


Tim

Matt_toynton

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Reply #2

Feared you might say that Tim, ALK at 11.8 from 8.7 - all other corals seem fine. Is there much I can do, do you think it will adjust to the higher ALK . I’m pretty new to this and took the salt on the advice of the store to negate supplementing

Asco1104

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Reply #3

I havnt had the skin strip of a Duncan but if skin comes of a sps it’s normally a gonner. Only time will tell I’m afraid.
Keep a eye on your other corals, they can look ok for a few months and then react to a stress event.


Tim

Matt_toynton

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Reply #4

All other water parameters are as followsammonia 0ppm Nitrate 0ppm Nitrite 0ppm Phosphates <0.3 ppm Calcium 450ppm Temp 25c Salinity 34ppm PH 8.0 Magnesium 1320 ppm ALK 11.8

Matt_toynton

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Reply #5

Do these look ok - no SPS in tank

Asco1104

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Reply #6

Is the phosphate 0.3 or 0.03?


Tim

Matt_toynton

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Reply #7

0.03 Tim, had an algae issue a few months back when I first took the tank on, and Phospahates were fairly high, since treating with Red Sea phosphate and nitrate remover tank looking much better

Asco1104

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Reply #8

That’s good then, all those numbers look fine, don’t keep nitrate at zero for to long though as softies and lps do prefer them around 5ppm


Tim

Matt_toynton

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Reply #9

Cheers Tim much appreciated - stupid question what’s the best way to raise the nitrates slightly .? Obviously stop or reduce  treatment from the phosphate remover but to be honest nitrates were not ever above 1ppm




Asco1104

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Reply #10

Just feed a bit more but watch your phosphate


Tim

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