Curing Fin Rot
Fin rot is a disease affecting fish with long, soft fins such as
the Zebra Danio. A tank with good quality water is not likely to show
signs of fin rot. It is most commonly introduced into a tank by new fish.
There are several ways to address fin rot:
Make sure the pH isn't too high
Change 20% of your water to improve water quality.
Add aquarium salt. This can be purchased from most pet stores. Add a teaspoonful for each 10 gallons or about
three pinches of salt between two fingers. Most fish can easily
tolerate small quantities of salt. This approach isn't recommended for
scaleless fish such as plecos though.
Add Mela Fix, which is made by Aquarium Pharmaceuticals Inc
and contains melaleuca. It is recommended for fin and tail rot, open
red sores, open body wounds, eye cloud, pop eye, body slime and mouth
fungus. Carbon filters should be removed during treatment and water
changes should be done after the treatment. Mela Fix is sold at
Add a penicillin based drug, such as tetracycline. Carbon filters should be removed during treatment and water
changes should be done after the treatment. Tetracycline is sold by
You should see a rapid improvement in fin quality, as most fish
will regenerate their fins. If not, it's time to quarantine affected fish.
For a more detailed analysis of fin rot problems, visit