even though we chatted on the phone ill post it here so others can see what needs to be done
first youll need to remove any visable jelly, either via syphon which is what i recommend or by removing the coral and snipping off whats dead and rinsing whats left or simply toss it out.
two fresh batches of carbon back to back(aggressive)
i would remove and furan2 dip anything else you think may be infected or showing signs of flesh sloughing off (sps) to kill off the bacteria.
keep up with your water changes and monitor for amonia this will be healthy for your system anyways.
keep up with the flow and avoid new lps for a couple of weeks while the system settles.
not gonna lie you may lose a few pieces but the rest can be saved.
like i mentioned when buying new corals fresh off the boat we dont exactly know theyr'e previous history so always dip as a preventative precaution and buy livestock carefully.
if its not brown jelly and in fact something else this wont hurt your system and will help remedy it while you find the root cause.
hth and like i said if there's anything concept can do to help don't hesitate to ask buddy
good luck
denny