Urgent Help: 10-15 Fish Dying Daily with Swollen Scales and Ulcers

Hello Hive community!
​I am facing a deeply distressing situation with my fish pond. Over the last few days, about 10 to 15 fish are dying every single day.
​With my background in agricultural education, I have been observing the affected fish very closely to understand the root cause. I have noticed some specific and alarming symptoms before they die:
​Scale Protrusion: The scales of the fish suddenly swell up and stand out like pinecones.
​Scale Loss: After swelling, the scales start falling off their bodies.
​Ulcers/Lesions: Severe, ulcer-like sores develop on their skin where the scales have fallen off.
​Ultimately, the fish succumb to these conditions and die.
​

​I am urgently reaching out to the aquaculture experts, veterinarians, and experienced fish farmers in this global community. My specific questions are:
​What specific disease causes these exact symptoms (swollen scales, scale shedding, and ulcers)? Is it Dropsy, Epizootic Ulcerative Syndrome (EUS), or something else?

​What immediate treatments, medicines, or pond management methods should I apply to stop this mortality and save the rest of the fish?
​Your cooperation and expert advice are highly needed right now. Any guidance on the correct medication or water treatment will be greatly appreciated. Thank you in advance!