My other thread got locked but wanted to update. I have some sterbai corys that had what looked to be a fungal or bacterial infection. Possibly columnaris. First I tried a round of Maracyn and Maracyn Oxy. Seemed to help a little but not much. Tried a round of salt baths next. I couldn’t ever catch the one that had the worst of it and by the time I did it was too late and I think the salt bath was too much for him. After discussing with T TwoTankAmin I tried another round of Maracyn combined with Maracyn 2. Fish all look good now. Hoping to release my two out of their observation basket today/tomorrow during water change.