Can you house a betta in quart?

While it is possible to house a betta in a quart container, it is not ideal. Bettas need at least one gallon of water to be healthy, and anything less than this can cause them to become stressed and ill. In addition, a quart container does not provide enough space for the betta to swim and explore, which can lead to boredom and decreased activity.

I would recommend that you upgrade your betta to a larger tank soon as possible. This will help your betta stay healthy and live a long life.