Green finger coral not opening

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Hi all, about a week ago I bought this green finger coral, I think it's a type of leather coral.
It sloughed shortly after putting it into the DT, but hasn't opened up much since.
It expands in daylight and VERY slowly the polyps are coming out as you see in the pic (sorry for the colour cast, I can't seem to change it on my phone). Any ideas as to what could be wrong?

ajm83

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Reply #1

Looks a nice piece,  devils finger coral maybe.  I had one of those and it would shed it's coating once a month or so,  and take about a week to fully open again.


Carol

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Reply #2

I always found that soft corals liked as much flow as hard ones, when I had less flow they would shut down every so often then shed and expand .They never did this when I increased the flow. I have no idea how much flow you have. Also theres the issue of water quality  and are any of the other corals acting the goat?

It may purely be that its adjusting to new conditions like light , etc. Soft corals can sulk amazingly .

marine_newbie

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Reply #3

I always found that soft corals liked as much flow as hard ones, when I had less flow they would shut down every so often then shed and expand .They never did this when I increased the flow. I have no idea how much flow you have. Also theres the issue of water quality  and are any of the other corals acting the goat?

It may purely be that its adjusting to new conditions like light , etc. Soft corals can sulk amazingly .
+1 for softies ability to sulk. Have a toadstool that only yesterday opened again, but was sulking for a good three weeks


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semiroundel

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Reply #4

Thanks for your rapid replies people, I will check prams tomorrow, but I'm nit expecting any issues.
On a you tube video from reefcentral, they did indicate lots of flow and high lighting, the former isn't a problem, it's almost being blown off its perch, but regarding light, could anyone dictate how long I should have the intense (middle of the day) period for?

ajm83

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Reply #5



Thanks for your rapid replies people, I will check prams tomorrow, but I'm nit expecting any issues.
On a you tube video from reefcentral, they did indicate lots of flow and high lighting, the former isn't a problem, it's almost being blown off its perch, but regarding light, could anyone dictate how long I should have the intense (middle of the day) period for?

I'm using ecotech 's AB+ programme which is 7 hours with an hour of ramping each end.

I wouldn't say they need high light though.  A par level of 100-200 would be fine. They can take higher light than that but don't require it.

These are not a fussy coral





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Carol

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Reply #6

Back when I moved from T5 only to T5 plus halide ,I noticed mine,which had a purple base and green polyps did do better. But they shouldnt really be high demand on the lighting front. As for LED I havent yet ever got my head round it . I have LED lights but so far havent got the results I did with Halide .

semiroundel

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Reply #7

Back when I moved from T5 only to T5 plus halide ,I noticed mine,which had a purple base and green polyps did do better. But they shouldnt really be high demand on the lighting front. As for LED I havent yet ever got my head round it . I have LED lights but so far havent got the results I did with Halide .
You're right when I had Halides, things did seem to open up more, having said that, some things did get burned.
I've got zero Nitrates, 0.13 phosphates (highish I know, but not so high to cause problems IMHO)
However, the DT has been fallow for 2 months, despite ghost feeding, not a lot of input of phosphates.
Now I'd better get that ATS finshed...and the protein skimmer installed

The finger coral is slowly coming out now, maybe it's a slow learner

semiroundel

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Reply #8


I'm using ecotech 's AB+ programme which is 7 hours with an hour of ramping each end.

I wouldn't say they need high light though.  A par level of 100-200 would be fine. They can take higher light than that but don't require it.

These are not a fussy coral





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Thanks for that @ajm83 I'll try and employ that regime.

ajm83

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Reply #9

You're right when I had Halides, things did seem to open up more, having said that, some things did get burned.
I've got zero Nitrates, 0.13 phosphates (highish I know, but not so high to cause problems IMHO)
However, the DT has been fallow for 2 months, despite ghost feeding, not a lot of input of phosphates.
Now I'd better get that ATS finshed...and the protein skimmer installed

The finger coral is slowly coming out now, maybe it's a slow learner

Phosphate could be coming off your rock 🙂

Personally I wouldn't worry about either of your phos or nitrate readings.  If you get cyano forming, then maybe increase nitrate a little.

ajm83

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Reply #10

@semiroundel how's it looking now sr?

semiroundel

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Reply #11

@semiroundel how's it looking now sr?
Hi, thanks for asking.
It swells up nicely in light now (having said that, last two days it's shrunk and no polyps out but I guess it's just sulking) but the only thing I'm perturbed by is the fact that unlike other leather corals I've had, only a small percentage of the polyps come out of the fingers.
I do wonder if that's normal with these. Dunno to be fair.
Will have to see with time.
If you look at the photo I posted, I'd say at best there's only about half as many again polyps coming out.

Carol

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Reply #12

I had the sort with a purple mat and bright green polyps ,they all came out . Likewise plain brown ones. For what its worth they were under 2x 250w halides and 4x T 5 ,with pretty fast flow.
Just a thought....nothing is nipping it? Nothing you can see that looks like a parasite? Oh yeah...creep downstairs at 2am approx, look for Tritonia ...think thats the right word...their a Nudibranch white fluffy back...they can cause this .

semiroundel

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Reply #13

Nope, nothing in the vicinity, just gone into "hiding" mode agian now, we'll see what happens when it opens again.
Plenty of flow and light. Does anyone have a par reading for what they like?

ajm83

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Reply #14

Nope, nothing in the vicinity, just gone into "hiding" mode agian now, we'll see what happens when it opens again.
Plenty of flow and light. Does anyone have a par reading for what they like?
80 - 250 https://vividaquariums.com/products/yellow-devils-hand-leather-coral
100 - 250 https://www.aquariumcreationsonline.net/DevilsHandLeatherCoral.html

That aquarium creations link is worth a read.

Mine was in 100-200 and did well.

One other thing is lots of different species are called devil's hand leathers by hobbiests. So the data might not be exactly right for the one you have.



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Last Edit: Jan 9, 2021 7:19:21 am by ajm83

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