Yes, bettafix can fix fin rot if the fin rot is not serious. If there is 1/2 of the original fin still left the I recommend bettafix as it is made of organic material and is very effective.
Of course, try Stress Coat or BettaFix to help it grow faster.
The Betta fish may have a fungus disease if there are small black spots on the back. It could also just be aging spots that some Betta fish get. You can purchase BettaFix at any pet store and add it to water to see if that helps.
Feed Betta little peice of a boiled Pea.
Betta splendens are fish and do not have the same kinds of emotions that humans have. Poor conditions and bad treatment will result in sickness and death rather than bad temper. The only thing that will stir a Betta up is another Betta in its' environment.
There are some. I believe your beta fish's tail is torn because of fin rot. There is a cure for that in pet stores.
This could be an indicator that he is sick. Immediately go out and get a product called "BettaFix Remedy" Follow the directions carefully for the amount of water you have in your tank or bowl. You can also try something new. If you are using pellets, try Betta flake food instead. For a real treat, frozen bloodworms are definitely worth trying out.
I personally don't know of any treatment that is guaranteed to work for a swim bladder problem. There are some proprietory medications available in some pet shops. Maybe one of those can help.
other Betta fish and the bigger fish.
Betta fish do not eat fish.
No betta fish are carnivores.
Well, if you love your Betta fish, then it should live by itself. But if you add another Betta to your current Betta fish's tank, then they will start a fight because Betta Fish are Siamese fighting fish and if one Betta is in contact of another Betta, the possible reason would be a fight between them two.
A betta is a fish of the species Betta, especially Betta splendens, commonly known as the Siamese fighting fish.