How to Care for a Sick Betta Fish

The betta fish, sometimes known as Siamese fighting fish, is a freshwater species popular among fish collectors in the United States. Captive-reared bettas often have spectacular flowing dorsal, pectoral and tail fins that fan out in a range of colors. Though a relatively hardy fish species, bettas are vulnerable to several common aquarium diseases. The species doesn't require a large tank to survive, but this frequently leads to conditions that can affect fish, for example overcrowding and dirty water.

Things You'll Need

  • Thermometer
  • Tank heater
  • Spare tank
  • Aquarium salt
  • Tetracycline (optional)
  • Jungle fungus eliminator (optional)
  • Anti-white-spot treatment (optional)
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Instructions

    • 1

      Get to know your betta fish's behavior and normal appearance. Lots of early warning signs for fish diseases include behavioral changes or a dullness to once vibrant skin colors.

    • 2

      Check your tank environment. Betta fish prefer water temperatures of around 80 degrees F and a tank of at least a 1-gallon capacity, according to the Berkeley Parents Network. Add a thermometer to monitor temperatures and a small heater to maintain constant levels.

    • 3

      Isolate any betta fish that starts showing symptoms of illness. This protects the betta fish and the other fish in the tank. Scoop some of the water from the betta's tank into a large jar or bowl to reduce stress in the moved fish. Try changing the original tank water and cleaning the glass if the fish is listless or slow-moving.

    • 4

      Check the tail and fins for signs of erosion, a common symptom of fin rot. Treat this fungal condition with the antibiotic tetracycline, or a dose of jungle fungus eliminator, according to Betta Talk. Closely follow directions on the treatment package. Aquarium salt and clean water help prevent fungal infections.

    • 5

      Look for evidence of ich, or white-spot disease. As the name suggests, symptoms include little white blotches on the fish's head, gills and body. Raise water temperature to 85 degrees F to kill off the protozoa responsible for the spots, according to Bettafish.co.uk. Add some aquarium salt or anti-white-spot treatment as required.

    • 6

      Note your betta's swimming position. If it's angled to one side and floating up to the surface, it may have swim bladder problems. Reduce the amount you feed the betta, as swim bladder bloating is frequently the result of overeating.

    • 7

      Immediately isolate fish with raised, prominent scales. This could be the fatal condition dropsy. Dropsy is potentially contagious and untreatable. Care for the sick betta in a fresh tank away from other fish.