Author: Last updated:

Causes Of Disease

In this area of the site you can find out about the best ways to prevent, identify, and treat diseases to keep your fish healthy. Just use the menu on the left to read the various sections and guides, or look at some common diseases and health problems with the Common Diseases list

What causes diseases?

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

fish health diagram 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.

Click to read the Latest Tropical Fish discussions from Thinkfish users.

Think Fish Tropical Fish Forum
Tropical Fish Market Place
Fish of the month

Helping Fishkeepers With Their Fishkeeping Needs Since 2006