Columnaris, in its acute form, sucks. I lost 6 rams to it, 4 of them in a week. The first one to show signs had a swollen mouth that showed up in the morning; was dead by sundown. I treated with in the tank antibiotics, then tried medicated food with the survivors. Nope. Lost em all within the month.
And its not you. Its your source, just as it was with mine. I bought 4 rams a month later (after leaving the tank fallow in terms of fish for that month); they are fat healthy pigs who breed regularly.