Here's why:
* Water quality: Smaller tanks are more prone to rapid fluctuations in water parameters like ammonia and nitrates, which can be harmful to bettas.
* Space: Bettas are known for their elaborate fin displays and enjoy swimming around. A larger tank allows them more room to move and explore.
* Enrichment: With more space, you can provide enrichment items like live plants, caves, and ornaments to keep them stimulated and entertained.
Here's a breakdown of recommended tank sizes:
* Single Betta: 2.5 gallons minimum, 5 gallons ideal
* Betta with tank mates (small, peaceful fish): 10 gallons or larger
Remember: It's always better to err on the side of a larger tank.