Help ! Torch Coral dying, not identified parasite ( Pictures)

[Conosch17]

I have this torch coral it’s been 2 weeks and day after day was shrinking. I decided to do a Saechem reef dip and I notice this weird parasite or whatever it is on the skeleton. Can someone help me identify what it is? Thank you

 

[Bucs20fan]

That is a feather duster worm, filter feeder. That is not what is causing harm to this coral.

 

[Conosch17]

That is a feather duster worm, filter feeder. That is not what is causing harm to this coral.

Okay. I checked and apparently is not harmful..

 

[Rick's Reviews]

Have you checked parimiters of your aquarium, if it has shrunk day after day then at a guess it's not happy.

I would not recommend seachem reef dip.

 

[Conosch17]

Have you checked parimiters of your aquarium, if it has shrunk day after day then at a guess it's not happy.

I would not recommend seachem reef dip.

I checked daily! All other corals are puffy and open even other euphyllia I have ( frogspawn) are doing fine. My water parameters are:
PH: 8.2
AMMONIA : 0
NITRITE : 0
NITRATE : 0.10
PHOSPHATE: 0.15 c.a
KH : 10
CA : 400