The best food for tropical fish fry is tiny, live or finely ground food they can swallow whole: infusoria or liquid fry food for the first days, then baby brine shrimp, microworms and powdered fry food. Feed small amounts several times a day and keep the water clean.
First Foods for Newly Free-Swimming Fry
Fry first live off their yolk sacs. Once they swim freely, they need food small enough for a tiny mouth.
- Infusoria: microscopic organisms cultured in a jar with plant matter. Useful for the smallest fry, but hard to keep consistent.
- Liquid or powdered fry food: a convenient commercial option. Use only a tiny pinch so it doesn’t foul the water.
- Rotifers: live food small enough for very small fry, though they’re more involved to culture.
Growing-On Foods
- Baby brine shrimp (newly hatched): a favorite of many breeders because it is high in protein and moves in a way that triggers fry to eat. You hatch them at home from cysts in salt water.
- Microworms: easy to culture, and they wiggle in the water column, which keeps them in reach of fry. They can smell as cultures age, so refresh them regularly.
- Vinegar eels: another long-lasting live food for small fry.
- Finely crushed flake or small pellets: when fry are bigger, crush a quality flake between your fingers into powder.
Egg yolk is sometimes used for fry, but it fouls water quickly, so many breeders skip it or use only a trace.
How Often to Feed
Fry have tiny stomachs and fast metabolisms. Feed small amounts three to five times a day, and only as much as they finish in a few minutes. Siphon out uneaten food, because rotting food hurts water quality fast.
Keep the Water Safe
- Use a gentle sponge filter so fry aren’t sucked in.
- Do small, frequent water changes with matched temperature and dechlorinated water.
- If you collect live food from ponds or wild sources, be aware it may carry pests such as hydra or disease. Cultured food is safer.
Species-Specific Guides
Different species have different needs. See our guides to best food for betta fry, best food for cichlid fry and pygmy corydoras food.
Bottom Line
Start with infusoria or liquid fry food, then move to baby brine shrimp and microworms and finally to crushed flake. Small, frequent meals and clean water matter more than any single food.
