Unacceptable Homes
Betta in a bowl
This is one of THE WORST possible homes one can give his or her betta. First of all, most are too small. Secondly, the shape of the bowl inhibits sufficient oxygen from getting to the betta. Thirdly, many bowls that come with a plant give instructions that the betta should not be fed because the plant and the betta feed each other. Do not listen to any of that. Bettas are carnivores, meaning plants don't give them any nutritional value. Sure they'll nibble on the roots, but only because they're extremely hungry. I'm sure you'd a bug if you were starving.
I don't mean to scare you away from keeping bettas, but so many people keep them in small bowls or don't even bother to keep up with their cleanings. Then, they're confused about why their fish are dying. Just remember to always try to give the best for your betta and they'll thank you with their unique personality.