Egg like bumps on the fins sounds like lymphocystis. That could very well be the primary issue and columnaris is taking advantage of the situation and is a secondary bacterial infection. Lymph (if that is what it is) unfortunately has no cure but usually goes into remission with clean water and good food.
Wish you had a better camera or I could see them in person.
Kanamycin is a powder and you just treat the tank according to how many gallons it is. It will kill your biofilter just like any other antibiotic (they don't discriminate between "good" and "bad" bacteria). Seachem makes it and so does another company I can't think of. A good LFS should have it or you can find it online.
Do some research before you decide. One thing I would do with a bacterial infection is lower the temperature to the 75 F range and add salt, should help a little bit.
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Wish you had a better camera or I could see them in person.
Kanamycin is a powder and you just treat the tank according to how many gallons it is. It will kill your biofilter just like any other antibiotic (they don't discriminate between "good" and "bad" bacteria). Seachem makes it and so does another company I can't think of. A good LFS should have it or you can find it online.
Do some research before you decide. One thing I would do with a bacterial infection is lower the temperature to the 75 F range and add salt, should help a little bit.
Sent from my iPhone using MonsterAquariaNetwork app