What are the most common diseases that affect bettas?

What are the most common diseases that affect bettas?

Marc Grover (Professional Aquarist) gives expert video advice on: Why aren't male bettas kept in the same tank?; Can I put a betta in my aquarium with other fish?; Where is the best place to put my betta? and more...

Most the time you'll see what they call 'betta disease,' and I don't even know what that means, but it's not really scientific. Fin and tail rot is mostly what you'll see. Sometime you'll see a mouth fungus and it's really noticeable. They get a lot of deterioration on their lip area of their mouth. There are some remedies for the fin and tail rot, I believe it's antibiotic, and probably for the mouth rot as well, antibiotic or antifungal.