Note salt alone will NOT solve this.
Treatment:
Treatment
Change water
Vacuum gravel
Add aquarium salt
Treat with copper sulfate or antibiotic
Discontinue carbon filtration during treatment
External infections should be treated with either antibiotics, chemicals in the water, or both. Copper sulfate, Acriflavine, Furan, and Terramycin may all be used externally to treat Columnaris. Terramycin has proven to be quite effective both as a bath, and when used to treat foods for internal infections. Salt may be added to the water to enhance gill function. Livebearers in particular will benefit from the addition of salt, however use caution when treating catfish, as many are highly sensitive to salt. When in doubt error on the side of caution when using salt.
