How to keep a betta fish tank clean Betta fish, or Siamese fighting fish, are an easy pet compared to many others. They don’t require a large tank. Additionally, you don’t need to aerate their ...

The absolute minimum tank size for a betta fish is around 5 gallons (19 liters). However, for optimal health and happiness, it's recommended to go for a larger tank if possible.

If your betta fish is still in their tank, they're probably sleeping! Here's everything you need to know about how betta fish sleep, according to vets.