Torch Index Select

I /think/ my torch has BJD. I took the brown goop off of the skeleton-showing/recessed part of the coral and put it under a microscope and saw what looked similar to what I've seen other users post. If so, thoughts on what I can do to save this coral, but most importantly, protect the rest?

torch index select 1

The purple torch was pretty much the same size as the larger. Both torches close at night, but takes longer to open than the green. Was initially a similar size, but is becoming more and more reclusive. Amonia 0 Nitrate 15-20ppm Ph 8.1 Sal 1.025 Alk 9.9 Calc 415 Mag 1300 Phos 0.08 Temp 79...

torch index select 2