My nitrites are at 0, my ammonia is at 0 and my nitrates are at 0. So the tank shouldn't be having problems. I maintain my tank between 82 and 84 degrees most of the time, but I'll keep it elevated even more for a while. My next concern however, since my params are good is fish tuberculosis? I know it's pretty uncommon but I don't know how else to explain all the deaths.

On another very interesting note, I have a rabbit snail and the tip of his shell recently broke off and I didn't think much of it, but tonight we discovered that the broken off bit contains a baby snail!