Yes they can if there are items or decorations in their tank that could hurt them if they swam too close.
No. Charcoal bits will harm your betta fish. But you can use deactivated charcoal bits
I am no expert, but believe that betas are solitary and prefer to have a fish bowl to themselves.
Betta fish do live by themselves, as int hey don't travel in groups. But more then one betta inhabits a space. They live in mile long rice paddies.
NO they will kill themselves please don't even try.
The cover is necessary for Bettas. It keeps the air above the water moist and warm so that when the Betta takes in a gulp of air it will not harm the fish.
other Betta fish and the bigger fish.
Betta fish do not eat fish.
No betta fish are carnivores.
Possibly. It depends. A bala shark is a calm community fish, while a betta is a fighter. Most people say that bettas will fight any fish, as some do fight other fish, but rarely do they do that.Bettas can basically live with any fish but themselves. Most bettas are calm, but some can be aggressive and should live in their own tank/bowl. Bala sharks will do no harm to the fish whatsoever. So, the answer depends on your bettas personality
You may have to smash the ornament somehow., but be carefull not to harm the fish. Ornaments do not belong in a fish type environment. Try water plants.
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.