Betta fish, also known as Siamese fighting fish, are typically kept in small aquariums or fish tanks. However, it’s a common misconception that they can thrive in tiny containers or bowls. In reality, betta fish should be provided with a suitable habitat that meets their needs for space, water quality, and environmental enrichment. Here are some guidelines for the tank size and conditions betta fish need:

1. Minimum Tank Size: A betta fish should ideally be kept in a tank that is at least 5 gallons (19 liters) in size. This provides enough space for them to swim, explore, and establish territories.
2. Heating: Betta fish are tropical fish and require a consistent water temperature between 78°F and 82°F (25°C to 28°C). A heater may be necessary to maintain this temperature, especially if you live in a region with fluctuating temperatures.
3. Filtration: A small, gentle filter can help maintain water quality by removing waste and maintaining oxygen levels. Be cautious with filter flow; bettas don’t like strong currents, so choose a filter that won’t create too much water movement.
4. Decorations and Plants: Bettas enjoy a well-decorated tank with hiding spots and live or silk plants. They like to rest on broad leaves or surfaces near the water’s surface because they have a specialized labyrinth organ that allows them to breathe air from the surface.
5. Water Quality: Regular water changes are essential to keep the water clean and free of ammonia, nitrites, and nitrates. Betta fish are sensitive to poor water quality, and neglecting this can lead to health issues.
6. Tank Lid: Bettas are known to jump, so it’s a good idea to have a lid or cover for your tank to prevent them from leaping out.

Remember that while betta fish can survive in small containers for short periods, they won’t thrive in such conditions. Providing them with a larger, well-maintained tank will promote their health, happiness, and longevity. A proper tank setup not only benefits the fish but also enhances their vibrant colors and natural behaviors.