Betta fry are rather versatile and will do OK on any commercial baby dry food. However if you really want to give them the best start a brine shrimp culture and feed them baby brine shrimp. In the “real world,” Betta fry eat stuff that is essentially invisible to the human eye—infusoria. The term comes from “infusion,” but what it really is is nothing more than water in which a large population of microorganisms have been encouraged to grow. So many aquarists are so obsessed with keeping their tanks “clean” and tidy that they often make them somewhat sterile and very unnatural.

You can raise baby Bettas by making the breeding tank more natural. Use aged water, plant it with a variety of aquatic plants, and stick a bundle of hay in one corner. Dried grass and a little soil from a local (unsprayed) field works, as does a little soil from an active compost pile. This hay (or whatever) material infuses in the water, turning the water yellowish or greenish and hatches out a variety of organisms from bacteria, to protists, to rotifers, and maybe even some nematodes. This is a feast for fish fry like baby Bettas. As they lose their egg sacs, they begin to feed on stuff you can’t even see. As they grow, they choose larger prey and you can watch them hunt along the stalks of plants and stems of hay or grass. At that time you can supplement with commercial foods -liquid, frozen, or ground flakes-and they will begin to feed on that, too.

According to the betta experts, live micro worms and baby brine shrimp are the best first foods. Unfortunately, unless your local fish stores has them in stock, you’ll need to order them, which will take several days until you receive them. Before feeding them, you need to be sure the yolk sacs are comepletely absorbed and the fry are free swimming, otherwise they won’t eat, and the food will spoil in the water. It’s also a good idea to remove the male betta, or he may eat the fry.

Betta Fish Eggs in the First Few Days

Betta fish eggs typically hatch between 24 to 48 hours after the breeding pair spawn. The male will play a parental role in caring for the eggs by guarding the bubble nest against potential predators. Once the eggs hatch, it is recommended to move them to a nursing tank so that you can give them your full attention and care without worrying if one of the adult betta fish will eat them.

After fry hatch from the eggs, they will receive essential nutrients from their yolk sac and do not need additional foods until they are swimming around the nursery tank and actively searching for sources of food. During this time, the fry is too small to eat fry foods and can only eat liquid-based such as a runny egg yolk from a boiled egg. Adding small amounts of the egg yolk allows them to easily consume it from the water column. This can make the water foul quickly and the filter should be cleaned a few hours after you add the runny yolk. Preparing the Fry Nursery

If you have not yet created a nursery tank for the fry, it is a good idea to create one after they have hatched in the spawning tank. Another option is to remove the parents from the breeding tank and only keep the fry in the tank. The tank should have a small sponge filter and lots of live plants like hornwort, java moss, and other bushy plants. These plants will provide shelter for the fry so that they can feel more comfortable and freer of stress which will lead to them growing into healthy adults. It is also easier to feed them in a tank that has no other fish that will beat them to the food. If there is not adequate surface agitation, you can place a small air stone or bubble wall in the tank to encourage better oxygenation. The tank does not have to be extremely large; a 10-gallon long tank will suffice.

You may also feed them the following;

Infusoria

This is the first type of liquid food betta fry can eat besides a runny egg yolk. This is a portion of good food for newly hatched fry because the small size of infusoria can easily be eaten by the fry. This should not become their primary source of food and they should only eat infusoria until their mouths are large enough to eat small particles. You can easily raise an infusoria culture from the pet store or an online fish store. An infusoria hatchery should be started as soon as the eggs have been laid and deemed fertile. Infusoria move fast through the water which will appeal more to the betta fish fry and they will have fun catching the infusoria.

To feed your fry the infusoria culture, you can catch them in an eyedropper and squeeze them directly into the fry nursery tank. You only need to feed a few infusoria at a time depending on the amount of fry in the tank.

Baby Brine Shrimp Nauplii

Once the betta fish fry has been fed egg yolk or infusoria for the first week, it is time to feed them a more protein-rich food that is slightly larger. Baby brine shrimp are a good food source that is high in meat-based protein and can easily be eaten by week-old fry. The baby brine shrimp can be collected the same way as the infusoria culture using an eyedropper. Starting a baby brine shrimp hatchery system can ensure that you have a constant food source on hand for the betta fish fry. Adult brine shrimp will be too large for the fry to consume and should only be used as breeding pairs.

Frozen and Freeze-Dried Foods

Once the fry has reached between 3 to 4 weeks of age, you can start to feed them frozen or freeze-dried foods. The food should be finely crushed using a blender until they form a powdered texture. Frozen foods should be thawed out overnight and then grounded into powder before feeding. Grounded food can be stored in the freezer for several days so that you do not have to ground the food every day.

Bloodworms,Daphnia,Tubifex Worms,Micro worms are foods that are high in protein and mimic a similar diet the fry will eat in the wild.

Commercial Betta Fish Fry Foods

If you feel that it is too confusing to deal with live cultures, you can purchase commercially created foods that are marketed as fish fry food if the fry is over a month old. These foods will typically come as micro pellets or in the form of a powder. Commercial foods are not the best source of nutrition for betta fry and can cause them to grow much slower than if they were being fed live protein-rich foods. Some fry will not eat micro fry pellets or flakes, so you should feed them a sample before buying the whole container of fry food only to find out that the fry does not accept it. In that case, you can ask the pet store if they have live cultures of insect larvae that have already been established.

Foods to Avoid

Betta fish cannot digest plant matter well and this can lead to bloat. Bloating can also cause a delay in the digestion and absorption of protein foods which will cause your betta fry to grow slowly. Avoid feeding the betta fish fry algae or leaf matter. Commercial fry foods can contain algae in the formula, which makes it important to check the ingredients before purchasing fry foods. Carnivore micro pellets for fry are the best option in this case. There should be little to no traces of plant matter in the ingredients list.

Conclusion

The amount and type of food you feed your betta fish fry is going to determine the growth rate of your fry. Betta fish fry grows faster when they are fed a varied diet that includes many different types of protein-based foods whether live, frozen, or freeze-dried foods. Live foods seem to increase their growth rate after the first few weeks, whereas infusoria grows betta fast in the first and second week. Ensuring that you feed the fry small meals throughout the day will ensure their dietary needs are being met.

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