What Do Baby Betta Fish Eat

For the first 24 to 48 hours, baby betta fry don't eat at all. They absorb their yolk sac, which provides all the nutrition they need. Once the sac is gone and the fry are free-swimming, you must offer food small enough for their tiny mouths, about 50 to 100 microns.

Infusoria is the go‑to first food. It's a mix of microscopic organisms like paramecium and rotifers that naturally live in established aquariums. You can also use liquid fry food designed for egglayers, but live infusoria gives better growth and survival rates.

Never try flakes or pellets at this stage; the particles will be too large and the fry will starve.

Infusoria is the only practical live food that matches the fry's mouth size and swimming ability. Baby bettas are weak swimmers at first, they need prey that drifts or hangs in the water column, not something that darts away. A bloom of infusoria also helps stabilize water quality by consuming leftover organic matter.

Many breeders start a culture two weeks before spawning by placing lettuce or hay in a jar of aquarium water and letting it sit in sunlight. Within days, a cloudy soup of single‑celled organisms appears. You feed by pipetting a few drops near the fry.

The tiny creatures stay suspended, giving every fry a shot at catching food.

Start a jar culture about ten days before you expect the fry to hatch. Fill a clean glass jar with aged aquarium water, add a pinch of hay or a piece of blanched lettuce, and set it in indirect light. Within three to five days the water turns milky, that's your infusoria bloom.

Scoop a few drops with a turkey baster and squirt them directly above the fry. Feed twice daily, but don't add so much that it fouls the water. You can maintain the culture by replacing the water and plant matter weekly.

If the jar starts to smell rotten, start a new one. Commercial infusoria starters are also available from specialty fish stores.

Around day five to seven, baby bettas are ready for bigger prey, baby brine shrimp nauplii. These are the freshly hatched larvae of Artemia, about 300 to 400 microns long. Hatching them from cysts takes 24 to 36 hours using a simple cone setup with salt water and strong aeration.

Feed the nauplii immediately after hatching; they lose nutritional value after a few hours. Rinse them with fresh water to avoid adding salt to the fry tank. Baby bettas grow noticeably faster once they're on brine shrimp.

Offer them two to three times a day. The fry will develop visible pink bellies when full.

If you don't want to hatch brine shrimp, microworms and vinegar eels are excellent alternatives. Microworms are tiny nematodes that grow on a paste of oatmeal or Cream of Wheat. They're about 100 microns wide and wriggle slowly, making them easy for fry to catch.

Vinegar eels (Turbatrix aceti) are even smaller and swim in a corkscrew pattern. Both cultures are simple to maintain, microworms need weekly transfers, while vinegar eels live in diluted apple cider vinegar. The downside is that microworms spoil water faster, and vinegar eels offer slightly less protein than brine shrimp.

Rotate between two foods for balanced nutrition.

Most baby bettas can handle finely crushed flake food around three to four weeks of age, when they're about a quarter inch long. Grind high‑quality flakes into a powder using a mortar and pestle, then sprinkle lightly over the surface. Watch closely, uneaten powder sinks and pollutes the tank quickly.

Start with one tiny pinch per day alongside live foods. By six weeks, the fry should accept small micro‑pellets or crushed granules. Never force the switch too early.

Fry that eat only processed food before their digestive systems mature often develop bloat or swim bladder problems.

Feed fry three to five times a day for the first three weeks. Their metabolism is extremely fast, and they have little body fat to fall back on. Smaller, more frequent meals also keep ammonia spikes lower than one big feeding.

After the first month, you can drop to three times a day. Each feeding should last no more than ten to fifteen minutes, any food left after that goes to waste. Use a turkey baster to target food near the fry rather than broadcasting it everywhere.

Consistent feeding schedules produce even growth and fewer runts.

The biggest mistake is offering food that's too large: fry literally can't fit it in their mouths and starve. Next is overfeeding, uneaten food rots, spikes ammonia, and kills fry faster than underfeeding. Another error is feeding only one type of food.

A single food rarely provides all the vitamins and minerals fry need. Also, many beginners stop live food too soon. Processed foods should supplement, not replace, live options until the fish are at least six weeks old.

Finally, neglecting water quality after feeding is deadly. Remove leftovers within an hour and perform small daily water changes.

Around six to eight weeks, start mixing adult foods with live foods. Begin by adding a small amount of crushed high‑protein pellet alongside brine shrimp. Over two weeks, gradually reduce the percentage of live food.

Monitor the fry's behavior, if they ignore the dry food, go back a step. Use a feeding ring to keep floating pellets in one spot so you can observe. By ten weeks, most bettas should eat a varied diet of pellets, flakes, and frozen bloodworms.

Don't rush the process. Some fry take longer to accept dry food, and forcing it can lead to refusal and weight loss.

If fry refuse food, first check water temperature, it must be between 78°F and 82°F. Cold water slows metabolism and suppresses appetite. Next, confirm the food size.

Use a magnifying glass to compare food particles to the fry's mouth opening. If the water is dirty from previous feedings, perform a small change and fast the fry for 12 hours. Sometimes a new batch of infusoria or freshly hatched brine shrimp reignites feeding.

Lastly, observe for disease. Fungus or bacteria can cause lethargy and loss of appetite. Isolate sick fry and treat with aquarium salt if needed.