FAQ: Can I keep my betta in a little bowl like Seachem Betta Basics™ seems to imply?

Of all fish, bettas are the best suited to living in a low-oxygen environment, due to their ability to supplement their oxygen with air from the surface.  However, that does not make a bowl a healthy or stable environment for a fish, due to space constraints, water instability, and a lack of temperature control or filtration.  We would consider the best environment for a betta to be a well-filtered aquarium of several gallons or more.