Thank you. I am not exactly sure. Out of the group of four there was one that was always a poor doer and I lost him maybe four months ago. I would be mycobacterium for this one. Then a couple of months ago I came home and found my biggest one dead. He was in great shape otherwise. The day before the weather got randomly really warm and when this happens my apartment gets really hot, so maybe heat stress. I wasn't able to come home that night due to work. Then the other two died just the other day. Both about 16 inches or so and in great body condition. All of them once dead/dying produce a ridiculous amount of thick slime. The tank is in good shape. I have a marble lancer cat and two small L14s and one small L114 with them so I wonder if they where harassing. No evidence of injury though and I never saw anything.
Once I do the moves, I will try them again in a species only tank. For the next year I am going to watch yours closely though and see what I should change
