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Causes Of Disease In Fish

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  • On 16/09/2019
  • In Health

Diseases are a natural part of any animals life and are a result of either disease causing agents (pathogens) or an incorrect environment.

Causes Of Disease In Fish

What causes diseases?

Disease pathogens are always present at low levels in the aquarium, but under correct conditions a fish will normally be able to prevent serious infection through the use of its natural immune system.


Identifying a disease problem and providing a remedy, if possible, begins with working out the cause. The next few pages outline the most common disease triggers. Make sure none of these are affecting your aquarium and you are on the right path to a healthy fish tank.


Low genetic immunity

Intense breeding programs which are used to develop colour or finnage strains require closely related fish to be bred together and offspring to be separated and isolated in order to pick the desired types for further breeding. This activity reduces the fish's genetic strength, natural immunity, and ability to deal with pathogens. A low genetic immunity causes a fish to be prone to infections, which the fish cannot fight, and is quickly overcome and often dies.


Incorrect diet

Like other complex animals, fish require a wide range of vitamins, nutrients, and minerals in order to survive and grow in a healthy manner. Correct feeding requires all these needs to be met as well as a correct frequency, amount, and avoiding excess. Incorrect diets will cause a weakening of the immune system, physical deformities, and excessive stresses on internal organs often leading to early death.

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