How often should I feed my betta fish?
Once or twice a day, 3–4 pellets per meal — as much as the fish clears in about two minutes and no more. Many keepers add one fasting day a week. A betta's stomach is roughly the size of its eye, and overfeeding is the single most common cause of death in captivity.
The portion is genuinely tiny
This is the interval where almost everyone gets it wrong in the same direction. A betta will beg at the glass indefinitely and will keep eating well past what it can process, because in the wild food arrives unpredictably and gorging is the correct strategy. In a tank it is not.
Three or four good-quality betta pellets, once or twice a day, is a full ration for an adult. If you feed twice, split the same amount — do not double it. Uneaten food should be netted out rather than left to break down.
The two-minute rule is the practical test: whatever is not eaten within about two minutes was too much, and next time you feed less. Bettas are also surface feeders, so pellets that sink fast may simply not be found — floating pellets suit them better.
What overfeeding actually does
A hungry betta is a healthy state; a chronically overfed one is not. If you are unsure, feed less. Nothing bad happens to an adult betta that misses a day, and the standard treatment for a bloated one is exactly that — fast it for 24–48 hours, then feed a small amount of daphnia or a piece of blanched, deshelled pea.
- Bloating and constipation: a visibly swollen belly, and a fish that stops passing waste. This is the most common betta ailment there is
- Swim bladder problems: a bloated gut presses on the swim bladder, and the fish struggles to stay upright or sinks
- Ammonia spikes: uneaten food decomposes, which is a water-quality problem that harms the fish more than the meal ever fed it
- Fatty liver disease over the longer term, and a shortened life
- A tank that clouds, smells, and grows a bacterial film on the surface
What to feed
Bettas are carnivores, and the label matters: a good pellet lists whole fish or shrimp meal first, not wheat or corn. Generic "tropical flakes" are largely plant-based and a poor staple.
Vary it once or twice a week with frozen or freeze-dried bloodworms, daphnia or brine shrimp as a treat rather than a staple — bloodworms in particular are rich and a common cause of bloat when fed daily. Live food is excellent enrichment where you can get it safely.
Fry and juveniles are the exception to everything above: they need feeding 3–4 times a day on much smaller food, because they are growing and cannot store reserves.
The intervals that matter more than feeding
For a betta, water is more important than food, and it runs on its own set of intervals. A 25% water change weekly in a filtered, cycled tank of 5 gallons or more. Testing ammonia, nitrite and nitrate — ammonia and nitrite at zero, nitrate low. A heater holding 24–27°C, because bettas are tropical and a cold betta stops eating and becomes lethargic. Filter media rinsed in tank water, never tap water, and never replaced wholesale.
Almost every "my betta stopped eating" problem turns out to be temperature or water quality rather than the food.