Help! Unknown tank infection, possible scoly dying

[Nutrient_Spike]

As youll see in the picture, there is something not right on my Scoly and it started on my mushroom which died, moved to my torch which died and then moved to my favia which... yep... you guessed it.... died.

I cant let my scoly go, havnt got many corals left now, can someone please help me with what it is and what to do?

 

[Dragon52]

#reefsquad

 

[Flippers4pups]

Water parameters, lights and lighting schedule please.

 

[Nutrient_Spike]

Water parameters, lights and lighting schedule please.

Alk 8.6
Magnesium 1375
Calcium 450
Nitrates 10
pH 8.4
Ammonia 0

Lights:
TMC Reef Photon Duo
11am - 3pm Whites
3pm - 7pm Blues

Thank you for any help

 

[kireek]

Do you know what your salinity is? Have you checked ,dipped or quarantined for parasites?

 

[Nutrient_Spike]

Do you know what your salinity is? Have you checked ,dipped or quarantined for parasites?

salinity is at 0.026 and i have dipped all of the previous corals but not this one, i'd love to fix it but id more like to be able to identify what it actually is too

Thanks