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Baby Betta Fish - Care And Breed Guide

Baby Betta Fish - Care And Breed Guide

You most likely are reading through this due to your betta fish newness. Maybe you have some experience raising a betta fish. In any event, we've got you covered.

Before raising betta fry, it s crucial that you be aware of the difficult nature of taking care of the fry. It is also advised that you avoid buying betta fry from pet stores.

Betta Fish, known as Siamese fighting fish, these aquarium fish are known for being hardy creatures that are also lots of fun to nurture, especially for beginners. Healthy adults typically range between 3 and 5 inches in length, but how fast do their offspring grow? In this post, we'll explore what you should expect from your little buddy's growth as they mature, so you can find out where your catch came from.

Where Can I Get a Baby Betta Fish?

The tricky part is actually here. Betta fry must be treated properly and usually die if not given a good start in life. Most pet stores don't provide these fry with the best start in life, so you will have to gauge the fish yourself before interacting with a pet store. The first betta fry you have to after buying it should be no more than 7 weeks old.

Bettas are normally traded in cups, so thoroughly check the water's status and the fry's health. As a general rule, purchase your fish there if the tanks are very clean and the fry is very active. If you discover a lot of dead fish in the tanks and cups, shop around and consider other options.

Your next best bet is buying a betta fry from a good breeder. Search online and look for message boards and groups devoted to betta fish, and someone will likely be able to help. One of your best options is to breed your own. If you have a handle on betta breeding and can care for newly hatched fry, you are more likely to succeed in their rearing.

Baby Betta Growth Chart

Baby Betta Growth Chart

Betta fish are believed to grow fully mature by 7 months, but they can still grow to about 3 inches tall if kept clean. An adult betta can grow up to 2.25 inches. They typically live for 2 to 4 years as pets.

Betta Age

Betta Length



0.03-inch diameter


1-day old fry

0.1 inch

At this point, the tail is not visible.

1 week

0.2 inches

The bottom begins becoming visible.

2 weeks

0.25 inches

Dorsal fins are now visible.

3 weeks

0.34 inches

At this stage, most of the fish should manifest plainly.

4 weeks

0.45 inches

Length differences between fish range from 0.4 inches to 0.5 inches.

5 weeks

0.6 inches

Some pet stores begin to sell juvenile bettas at this stage.

6 weeks

0.85 inches

Length variance is found to have been greater between fish of up to 0.75 inches and more than an inch.

7 weeks

1.1 inches

Fish should have reached at least one inch long by seven weeks.

8 weeks

1.3 inches

Any extra increase in length beyond this point is slow and will vary significantly between fishes.

9 weeks

1.55 inches

Many experts believe that the “juvenile” stage ends when bettas turn nine weeks old 

10 weeks

1.7 inches

11 weeks

1.9 inches

Tracking the growth of your fish from birth can be a highly rewarding experience, but remember, these numbers may vary depending on several variables! As long as you provide your bettas with proper care, you can feel at ease knowing the species will have long, happy lives ahead of them.

4 Betta Fish Life Stages

Betta Fish Life Stages

Raising young bettas for the first time can be an exciting undertaking for anyone in the aquarium trade, regardless of their experience. While the actual growth rate of individual fish can be hard to ascertain, there are several steps they take before reaching maturity.

Egg Stage

The life cycle of your fish starts when a female betta starts laying her eggs on the water surface of her breeding tank. This will begin around the same time you see the first bubble nest your female bettas develop. Fry will create two to three days after their initial egg sac appears, depending on the water temperature.

Fry Stage

Betta fry is very tiny, very much like a small shrimp. At this time, they are very delicate, so they require many hideaway areas where they can hide and eat their yolk sac without being bothered by other tank mates or predators.

Juvenile Stage

Your fry leaves the egg sacs when just about one week old, but they soon become called juveniles. Bettas reach this developmental point when just about two weeks old, but the time they need can vary based on how big their egg sacs are. They grow quickly during this stage of life and will be approximately 1 inch at two months old.

Adult Stage

With a one-year life span, a one-year-old betta is considered a young adult. You must be able to distinguish between males and females at this age. Bettas can live for two years if they are well-cared for, so you can enjoy quality time with your small pet!

Caring for Your Baby Betta

Now that you know how big your betta will be at each stage of its development, what steps will you have to take to care for them? These three tips will help you.

Maintain Ideal Water

You should control your water's purity for the health of your kid betta. Baby fish tanks are especially vulnerable to water temperatures because you don't wanna destroy your fish. Pay special attention to your fry during water changes, as they can be sucked into the pump when they're vulnerable.

You can also keep your fish in warm water by using a heater. These fish require water that is 74 to 82 degrees Fahrenheit. Employing a fish thermostat heater will keep your tank maintained. Young fish can be sensitive to temperature changes, so this step is vital.

Feed Appropriate Food

To boost the potential for your bettas to mature fully, you should feed them a high-protein, high-calorie diet. Baby bettas are naturally carnivorous and eat bloodworms and brine shrimp, but providing many fish species to your baby can be harmful. Refer to our feeding guide to learn more about feeding baby bettas.

Live dishes can also contain dangerous bacteria and parasites, which can destroy your fish. Because of these risks, purchasing live foods from trustworthy sources is always best.

Tank Size Matters

To increase healthy fish, you must give them a 20-gallon tank, which will act as a grow-out tank for your fry until they are about an inch long. Some aquarists choose to house younger fry in a 10-gallon tank breeding tank for 4-6 weeks before they move it to the larger tank.

Regardless of your chosen method, follow a strict checklist when adding new aquatic species to their environment. These creatures are sensitive to pH, ammonia, nitrite, and chlorine, so their tank should be cycled before introducing them to their new habitat.

What Kind of Tank Does My Baby Betta Need?

A baby betta needs to be put in a 2-gallon tank at a minimum, but 2.5 to 5 gallons is the ideal size. Any smaller can be dangerous to their health and stunt their growth, while any larger can result in stress.

You can increase the size of the aquarium when adult fish become present. Additionally, the tank should be fully cycled, and the water quality parameters must be maintained. The tank should be kept as close to mint as possible.

Adult bettas operate best when the water is warm. Baby bettas, on the other hand, require warm water slightly above 80 F; the ideal temp for them is between 76 F and 82 F.

Substrate, when used, should only be moved using sand or small pebbles aimed to keep away from large rocks or gemstones. Betta fry of all ages like investigating and finding the substrate. Bettas may drown if they get covered up by bigger pieces or gems.

Lastly, be extremely cautious when changing the water. Betta fry consume frequently and poop a lot, so changing the water is very important, but it can cause stress. Be as gentle as possible when handling the betta fry during water changes, and try not to make a lot of noises around the tank in general.

If you make use of a filter, it will reduce your total water changes, but a sponge filter is needed. Otherwise, the risk that your betta would be caught up in the current is too significant.

Can Baby Betta Fish Live Together?

Normally bettas can live together until they are about 8 to 9. However, when they reach about 8 weeks, they begin to show their colours. For this reason, some bettas will not be able to live with each other until they are about 8 to 9 weeks of age.

After separating them, you can keep one or both fish in separate bowls or provide each betta with its own tank. Keep in mind that larger bettas are very likely to eat smaller fish. You should also avoid placing other tank mates with a very small betta. Again, this could cause harm and stress, even with the most benign tank friends.

How to Make My Baby Betta Grow Bigger

The key to ensuring your betta flourishes lies in how well you care for it and how old it is.

First, ensure the aquarium is at least 5 gallons in size (and larger is always better). The filters must be maintained to keep the water clean, and the water temperature needs to be between 76 F and 82 F.

Bettas are carnivores, so stick to our advice on what to feed your fry to your baby betta, and the more Betta eats, the more they will flourish. Do as much research as possible on what to feed your fry so your baby betta will advance.

How to Breed Betta Fish

You need to begin with a fish tank, which is also where the fry will grow up. It is best to choose a 10-gallon tank and no additional substrate.

For a female betta, no more than four to 6 should be present in the same aquarium. Frank Bettas must reside separately. Otherwise, there's a good chance they'll fight violently and die, which is why their unique name is Siamese Fighting Fish.

Based on the information gathered, make certain that the male is energetic and healthy, has undamaged fins, and is brightly coloured (interestingly, studies have noted that female bettas prefer red-coloured males).

Start with adding the woman into the female enclosure and then put the male into the tank about 30 minutes later. They will engage in mating rituals in which the male makes a bubble nest that floats on the water's surface (it will look like a large cluster of tiny bubbles). The female then hovers under the nest and waits for mating with the male.

Once they mate, the female will lay her eggs, and after the egg's time point, the male will begin to place the eggs in a bubble nest. The male will invest in the nest for 3 days and care for the betta fry for the next 2 weeks. Once the fry is swimming in the water, the male must be removed from the nest, and you can feed the fry.


Bettas never cease to amaze with their development over their entire lives. Nurture and care time for your new pet may last from several months to a year, but you will greatly delight having her in your life for years to come.

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