The recommended daily feeding amount for betta fish is usually to feed them once a day, with about 10 small pellets of fish food each time. The specific feeding amount can be adjusted according to the age and size of the betta fish:
Juvenile betta fish: They can eat 5 to 7 pellets of fish food each time. You can feed them twice a day, preferably before 3 p.m. in the morning and afternoon.

Adult betta fish: They can eat about 10 pellets of fish food each time, and you can feed them once a day. If you need to increase the feeding frequency, you can feed them 3 to 5 times a day, with about 10 small pellets of fish food each time.
Feeding frequency and amount:
Frequency: It is recommended to feed them 3 to 5 times a day, following the principle of "eating less but more frequently" to avoid overfeeding.
Amount: About 10 small pellets of fish food each time. Avoid overfeeding to prevent gastrointestinal problems.
Water quality management:
Water change frequency: It is recommended to change the water once a week, or use a siphon to clean up the food residues and fish feces in a timely manner.
Points to note when changing water: Keep the water temperature stable and avoid a large temperature difference.
Water temperature control:
Suitable water temperature range: The suitable water temperature range for betta fish is 25-28°C. If the water temperature is too low, the fish will not be in good condition. If it is lower than 10°C, it may cause the fish to get frostbite or even freeze to death.