Bettas fish need a suitable environment to thrive. We recommend a tank of at least 5 gallons equipped with a filter and heater to keep them healthy and happy in the long term. We are professionals and although we temporarily keep them in small jars, we have them with frequent water changes and in a controlled environment. But in their final home with you they will need a larger space to explore and swim. Natural plants are very beneficial. This care guarantees your well-being and longevity.