receding chalice HELP

[maddy999]

If you look carefully, you can see the edge of the jelly bean chalice is beginning to receed, with sole white skeleton poking through. It is a small frag i got 1 month ago. first signs of recession shown a week ago.
pls help i posted a zoomed out image of the full tank, to show reference corals. (they are all doing fine other than jelly bean chalice)

Alk: 9
Ca 459
Sal 1.026
Nitrates ~3 ppm
Phosphates .02

Light redsea LED50, i have the blues at 45% and would estimate PAR at that part of the tank to be around 60-120

 

[T-J]

Maybe put it in some shade?
I only have one chalice in my tank, and I nearly killed it with light. I put it in a shady spot, and it has grown out of that spot and now fills an entire corner of my tank where it gets blasted by 120-150 PAR.

 

[maddy999]

Maybe put it in some shade?
I only have one chalice in my tank, and I nearly killed it with light. I put it in a shady spot, and it has grown out of that spot and now fills an entire corner of my tank where it gets blasted by 120-150 PAR.

What symptoms did your chalice show prior to moving it in a shady spot? bleaching or skeleton poking through/ recession

 

[T-J]

Recession was obvious. It was dying fast.
Here's a pic when it was almost a goner. A teeny frag. The other pics are of it today. It's about the size of my hand and takes up the whole bottom corner of the tank.

 

[maddy999]

Recession was obvious. It was dying fast.
Here's a pic when it was almost a goner. A teeny frag. The other pics are of it today. It's about the size of my hand and takes up the whole bottom corner of the tank.

interesting, i was always under the impression that high par causes bleaching, and low par causes recession,

nevertheless ill try putting the chalice under some shade and hope for the best,

its just confusing to me as to how the euphyllia and other coral which are way higher up are doing so well, but how the chalice all the way in the lowest spot would he getting burned

 

[T-J]

interesting, i was always under the impression that high par causes bleaching, and low par causes recession,

nevertheless ill try putting the chalice under some shade and hope for the best,

its just confusing to me as to how the euphyllia and other coral which are way higher up are doing so well, but how the chalice all the way in the lowest spot would he getting burned

Different corals need different levels of light. My acros laugh at 300+ PAR, while others would burst into flames in an instant.
I run a high PAR tank, so even at my lowest levels I'm over 100. Many corals can be acclimated to higher PAR than they normally would get.

 

[jlitz]

interesting, i was always under the impression that high par causes bleaching, and low par causes recession,

nevertheless ill try putting the chalice under some shade and hope for the best,

its just confusing to me as to how the euphyllia and other coral which are way higher up are doing so well, but how the chalice all the way in the lowest spot would he getting burned

Were you able to save the chalice? I have a year old jellybean that randomly started receding. Similar parameters to yours. Similar positioning with Phyllis etc. Nothing changed recently.