Principles of diagnosis

• To effectively treat fish diseases, we must first diagnose the fish disease clearly and then provide appropriate treatment.

• Diagnostic methods include:

- On-site disease control

- Learn about disease fish, check the condition of the fish population, the condition of swimming fish, fish gulping , and dead fish.

- Check the pond conditions: water quality and surrounding environment, such as the use of pesticides on rice crops or the discharge of chemical waste from factories near the fish pond.

- Learn about fish farming management. Poor pond management, such as over-fertilizing, feeding with insufficient nutrients, or overfeeding, causes polluted water, and cause diseases breakout.

- Catching fish with nets causes injuries to the fish, and prevent the of harmful fish such as snails, cockroaches, and birds, which are agents of disease transmission to fish.