Fin Rot

As the name suggests, fin rot causes the fins to turn opaque and they may even become
blood-streaked. The erosion of the fin may continue till it reaches the base of the fin. At
this point, the fish dies. The bacteria that cause this generally do not affect healthy fish.
When fish are stressed, or when the fins have already been damaged due to excessive fin
nipping, then the disease takes root. Commercially available anti-bacterial medicines
have to be used to treat the fish.