After a little reading it is coming back to me. I thought I probably did not have enough water flow...I added another cannister after my outbreak. My discus were the only ones effected and I did salt dips while I was waiting for the kanamycin I ordered. But the salt dips cleared it up for me. It is a very stressful thing to do to fish and I don't think I would do it with a cory. I would treat with kanamycin or erythromycin. Both seem to be effective. An antifungal will do nothing as it is a bacteria. I don't think any of the meds you listed will work. You need to go to LFS and get Maracyn...probably the quickest and easiest to find. If that doesn't clear it, try using maracyn 2. Also add add salt to your tank...I have done this with cories and they tolerate it fine...1 tablespoon per 10 gallons.
: so when doing my water change I moved a piece of decor and found that it has already killed a cory, and the one in the picture is on deaths door, in addition ANOTHER cory is showing what appear to be early signs of infection on its face. It looks pale-ish and one of its feelers is messed up looking. W/e this is its hitting my corries HARD. All other fish are fine except the lone tetra. So iv lost one cory, other is bad, another is infected. Oddly enough the only corries that are not infected and show no signs of any problems are my juli dwarf corries? I have 2, and both are totally fine. well this is quite the bummer... hopefully I can save the others.
