Baby Betta Fish: Comprehensive Guide To Proper Care

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Last Updated: February 27, 2023 by Flora Gibbins

Adult Bettas are a colorful addition to any aquarium, and they’re reasonably easy to take care of, but what about baby Bettas?

Is it challenging?

Baby Bettas are pretty challenging to keep, and they require monitoring more than adults. But, if you’re willing to go through this challenge and raise baby Betta fish, we’ll help you!

We’ll tell you all about their diet, breeding, ideal tank conditions, and more. So, without further ado, let’s jump in!

Ideal Tank Conditions

The first thing you should know is the ideal tank conditions for baby Betta fish. These are essential for the happiness and well-being of your baby Bettas.

Water Quality

Water Quality

First of all, baby Bettas prefer living in high-quality water, which means it’ll be best if you install a sponge filter. We know there are many other filters you can install, but they might create water currents in the aquarium.

Accordingly, they might cause your young Bettas to get sucked up into the current and get badly injured.

If you choose not to install a filter, you’ll need to maintain regular water changes to clean the tank. Ideally, you should change about 25% of the tank water twice every week. You can also use airline tubing or an aquarium vacuum to remove dirty water from the bottom of the tank.


In general, Betta fish are tropical, which means they need high temperatures to thrive. Baby Betta fish even love higher temperatures than adults.

If you raising baby Bettas, you should maintain an aquarium temperature ranging from 76 to 82 degrees Fahrenheit using an aquarium heater.

You should avoid changing the baby Betta tank temperature constantly because this can cause your Bettas to stress, which may hinder their growth.

Tank Size

While adult Betta fish live in large tanks, baby fish get stressed when they have ample space to swim. These are optimal for growth and won’t cause your fish any stress.

Ideally, if you want your baby fish to be comfortable and grow well, you should look for 2.5-5 gallons tanks.

Tank Substrate

Baby Bettas are curious and love exploring around the tank, so adding substrate will benefit them. However, rocks and gems aren’t suitable because newly hatched Betta fish might injure themselves or get trapped under them.

Try settling for small gravel or sand as a baby Betta tank substrate, instead.

Tank Mates

Tank Mates

Baby Bettas can live together in one tank until they begin to show colors. Once you notice this, you should separate your Bettas into different tanks. You can either put each one in a small tank or a cup.

They often show color once they reach about nine weeks, which is a sign that they’ll start getting more aggressive.

This way, you’ll avoid fights and injuries in your aquarium. But beware that you’ll also need to put more effort into feeding and monitoring all of your fish.

It’s worth mentioning that male Bettas are more aggressive than their female counterparts, and they love fighting, like all Siamese fighting fish. As for female Betta fish, you can keep them together in a sorority tank without an issue.

When breeding, you can keep one male with several females. Accordingly, if one female doesn’t want to mate, the male will have a higher chance of finding one that has no issues. When males don’t find available females to mate with, they get more aggressive than usual.

Fun Fact: It’s not recommended to keep other types of fish with baby Bettas since this might harm and stress your young fish.

How to Feed Baby Betta Fish

Feeding Baby Betta Fish

In the wild, Betta fish are carnivorous, and they mainly feed on insects and insect larvae. However, in tanks, they feed on live and frozen foods.

Young Bettas can eat live food like Daphnia, tubifex worms, brine shrimp nauplii, white worms, mosquito larvae, and Grindal worms.

If live food isn’t readily available, you can feed your Betta fry (newly-hatched fish) frozen foods or crushed pellet foods. If you feed them pellets, you should monitor them to ensure they eat the food. Sometimes, baby Betta fish ignore pellets and don’t go near them, which means they might starve if you don’t notice.

Foods for Baby Betta

Ideally, you should feed your Betta fry a minimum of two times per day, preferably even more. And you shouldn’t put too many pellets in the aquarium at once. Instead, you should put small amounts many times a day. This way, the water will stay clean, and your baby Betta fish will have a well-balanced diet that’ll help them grow.

Another meal you can provide for your Bettas is infusoria, which is a liquid fry food that you can add to the aquarium using an eyedropper. You can find it in many pet stores.

As baby Betta fish grow, they’ll be more ready to accept larger foods, so you should adjust their diet accordingly.

Where to Get Baby Betta Fish

Since young Betta fish are so fragile, they often don’t survive in fish stores for long. And although we don’t recommend buying them from such stores, sometimes it’s the only option. If it happens, you should check the conditions that the fish are living in and use your judgment to decide. But how can you do so?

Generally, most stores keep Betta fish in small cups, so you should look at them and make sure the water is clean and the fish is active. If you notice otherwise, look for another store.

Other than stores, you can purchase Betta fry from breeders, but it’ll take some online research to find a good one.

The option we recommend is that you breed your own Betta fish.

This way, you’ll know that they’re healthy and well-fed. And since breeding Betta fish might not be common knowledge, we’ll tell you everything you need to know about the process.

How to Breed Betta Fish

Breeding Betta Fish

The first step in breeding Bettas is to buy a breeding tank. Ideally, it should be a 10-gallon tank without any substrate. Then, you should get female and male Betta fish and ensure that your males are healthy and active with brightly colored bodies.

Next, add your females and wait about half an hour before adding the male Betta fish. The male will form a bubble nest at the water’s surface to attract the female, and then she’ll go over to him. After the mating rituals, the female will lay eggs, and the male will take them to care for them in the nest.

After this happens, you should take the female out of the tank and wait for the eggs to hatch. Once they do and the baby Betta fish start swimming, you can remove the male and raise the babies.

How to Make Baby Betta Fish Grow Faster

If you’re growing Betta fry for breeding purposes, you can fasten their growth through a few steps. First of all, Betta babies produce growth-inhibiting hormones (GIH) in the tank, which can slow down the fish’s growth rates. This way, you’ll keep the water clear of the hormones, and your Betta fish will grow faster.

You should change about 50% of the tank water every few days to fix this issue.

Secondly, feeding your Betta babies infusoria through an eyedropper for the first few days after hatching will give them all essential nutrients and help them grow.

After a few days of giving your Bettas infusoria, you can feed them newly hatched brine shrimp that you previously cultured at home or purchased. You can feed your Bettas shrimp multiple times in the same day or stick with two times a day but put larger amounts in the tank.

Bettas often start accepting brine shrimp nauplii at a young age, and it helps them grow quicker.

Thirdly, as your fish grow, it’s essential to upgrade their tank size. Small tanks cause fish stress, so they won’t be able to swim freely. Therefore, they’ll grow slower than average.

To avoid this, you should purchase at least a 10-gallon tank once your Bettas fully grow.

Finally, it’s better to separate Betta fish once they grow. This way, they won’t compete for food and will eat freely. More so, you’ll be able to monitor each one better to know which one is healthy and which isn’t.

Common Aquatic Diseases

Like all fish, baby Bettas are susceptible to getting many aquatic diseases. Most of the time, the diseases come from poor care for the fish.

For instance, if you forget to change the tank water and keep it clean, your fish will be more likely to get a bacterial infection. Likewise, if you feed your fish more or less than they should, they’ll have a higher risk of developing various diseases.

Bettas’ most common aquatic diseases are fin rot, Ich parasite infection, velvet infection, swim bladder disease, and dropsy.

Most of these can easily be treated by adding antibiotics or medicines to the water, but the success of the treatment depends on how early you discovered the disease. It’s easy to avoid these diseases if you maintain a clean aquarium and suitable water parameters for your fish.

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Frequently Asked Questions

Are baby Betta fish aggressive?

No, baby Betta fish aren’t aggressive. They shouldn’t cause fights and clash with tank mates until they become adults. That’s why it’s safe to keep many baby Bettas in the same tank.

What are suitable baby Betta tank mates?

Baby Betta fish shouldn’t have any tank mates (except themselves). But once your Bettas fully grow, you can put some other fish in the aquarium like Cory catfish, Malaysian trumpet snails, Tetras, and Platies. Beware that if you put larger fish than Bettas in the tank, they might feed on them.

What is an ideal baby Betta fish body size?

The answer depends on how old your fish is. If your baby Betta fish is only a week old, it should be about 0.2 inches long. Once it reaches the one-month milestone, it should be 0.4. Finally, your Betta should be about two inches long after two months.


Keeping fish is an exciting hobby, but it takes effort and commitment, especially when raising baby fish. Raising baby Betta fish is much more challenging than keeping adults; they’re more fragile, require closer monitoring, and need more frequent tank water changes.

Baby Bettas love feeding on live foods like brine shrimp and dried foods. More so, they require high temperatures, clean water, and small gravel in the tank.

Now that you know all about raising baby Bettas, you can maintain a healthy and colorful aquarium!

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