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Gas Bubble Disease

Symptoms include blisters that are clearly visible beneath the skin, particularly in the head area, in and around the eyes. Blisters may also form inside the body. Sick fish will make a croaking sound when removed from the water.


Oxygen oversaturation: This disease is most frequently seen in heavily planted or Algae-ridden aquariums or ponds. In such a scenario, oxygen production can be so great that it upsets the proper balance of dissolved gases in the water causing very small gas bubbles to form inside of the fish. If these bubbles move to the blood stream they can be fatal.


Perform an immediate water change to restore the proper gas balance. Clean away Algae and reduce the amount of live plants. Use an anti-algae chemical if necessary, such as Algae Destroyer. Reduce lighting to reduce oxygen production by the plants.

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