Betta fish illnesses are very easy to prevent, and very easy to cure.
There are a fixed number of variables, entirely within your control, that impact the health of your betta: 1.
The quality of the water in the tank or aquarium: The temperature, the cleanliness, the pH level of the water, the quantity of the water in the tank all play a role in your fish's general health.
2.
The quantity and quality of your betta fish's diet: Your betta only requires a certain amount and certain types of food every day.
How does underfeeding or overfeeding your fish impact its health? What about the variety of the types of foods in your fish's diet? 3.
The "amenities" of your fish's habitat: Are there rocks in the fish's aquarium? What about plants? Are they real or artificial? Could they be producing harmful toxins that could be adversely affecting your fish? 4.
Your fish's socialization: Does your betta live in isolation or does it coexist with other fish? How well does it get along with the other fish? Is your habitat causing undue stress on your fish? How can you tell if your marine friend is faced with one of the many betta fish illnesses out there?

• Your fish is docile and inactive most of the time.
  
• You see signs of discoloration, fading on your fish's body.
  
• You see visible signs of irregularities on the fish's body or in its fins such as rips, tears, or even bloating under the belly.