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Furunculosis
Symptoms:

Fish may present with frayed and inflamed fins, raised bumps underneath the scales which rupture releasing pus, and may also have large bleeding ulcers. There may also be hemorrhages in the internal organs, skin, gills, fins and muscle tissue. Not all symptoms need be present.

Cause:

Aeromonas bacterium, which infects a fish via skin parasites or when it ingests feces from infected fishes or feeds on the remains of dead fish.

Treatment:

Ensure that your water conditions (e.g., Ammonia, Nitrite, pH, Nitrate levels, and water temp.) are within their proper ranges. If not, perform a water change and/or treat the water accordingly. If your fish can handle it, raise the water temperature to 80 degrees or a little higher. Furunculosis is generally a cold-water disease; higher temperatures may help to eradicate the illness. Infected fishes should be isolated because when the lesions rupture, bacteria are dispersed throughout the water, leaving all fish at high risk of infection. Furunculosis can be highly infectious. All fish, including those not yet showing visible symptoms, as well as the aquarium they inhabit should be treated. Treatment should include one of the following: Triple Sulfa, Furacyn, Nitrofura-G, E.M. Tablets or Furan-2. The use of medicated food is also prudent. In addition, if parasites are suspected all fish as well as the aquarium they inhabit should be treated with an antiparasitic medication. Adding an appropriate amount of salt to the water may also be helpful.



 
 
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